Which engine flush cleans better. Flushing the engine before changing the oil

29.06.2020

Brake system

When changing the oil, the engine does not need to be flushed if the replacement is carried out with an oil identical to that used before. Manufacturers of high-quality oils add various additives to them that improve properties and perform additional tasks in relation to engine parts.

In particular, oils contain additives that clean the engine, which simultaneously perform the flushing function. When using such oil products, after you drain them, engine parts shine like from a store.

But still, it is necessary to flush the engine when changing the oil in the following circumstances:

You bought a new car and have no idea what kind of liquid is poured into the engine;
You change the brand and viscosity index of the lubricant;
If you suspect that antifreeze, fuel, or poor quality or unsuitable oil for the engine has entered the system.
If in the process of repairing the engine, the cylinder head was opened.

Is flushing fluid worth it?

The modern industry, which is fighting for the indispensable flushing of the engine during oil changes, produces separate flushing fluids. These same manufacturers recommend running their products through the engine after draining the old oil and before pouring in new. Another type of flushing - the so-called five-minute flushes are added to the drained oil.

Marketers of these same flushing fluids give dozens of arguments in favor of their use, but do engines really need them?

We must not forget that motor oil - be it mineral or synthetic - is a mixture of complex chemicals. Plus, various additives. Washing is also a mixture of chemicals, but different.

You have no idea about the composition of those and other fluids, you don’t know how the oil and flushing fluid will react with each other, what will happen as a result, and how this mixture will affect the engine. Is it worth the risk?

But most importantly, all these flushes, whether you like it or not, affect the viscosity of the lubricant and the quality of the additives. How?

When draining a motor oil product, approximately 10% is retained in the system. If you fill in the flushing fluid for flushing, then it is she who remains in the engine case and mixes with the new oil. That is, another 10 percent is added to 15 percent of factory additives, which, when mixed with oil additives, changes its chemical composition, and, consequently, its viscosity and other properties.

And where is the guarantee that as a result of all chemical reactions there will not be a “ruff” for the engine, which will first corrode the rings, and then will not take on metal parts? It is possible that fears are in most cases unfounded, but in any case, the oil will no longer work as intended by its manufacturer.

What else is harmful five-minute flushes that are poured into the engine before changing the oil? They do not fulfill their intended purpose - they are not able to dissolve and wash off the accumulated dirt.

The resulting deposits can clog the oil passages, preventing oil from reaching the engine parts. And this will lead to oil starvation of the internal combustion engine, which, running dry, will quickly fail.

Best way to flush an engine when changing oil

It is best to flush the engine when changing the oil like this:

First, warm up the engine, and only then drain the waste oil product. Take your time, give the liquid time to flow out as much as possible. If possible, if the machine is mounted on a lift, tilt it so that more waste fluid will flow out of the system.
Change the oil filter and fill with fresh oil. For two days, use the car, maintaining the break-in speed.
On the third day, change the oil and filter again.
Further replacement is recommended to be performed 2 times earlier than usual. That is, you always replace after 10 km, then this time do it after 5 thousand km.

Important: changing the oil with the old filter does not make any sense, because all the soot, all the dirt, the filter has collected on itself and when operating the car with the old filter, something will inevitably get into the new oil. And it will lose its purity. Therefore, change the oil, immediately change the filter.

After completing all these procedures, you can be sure that your engine is clean. To some, this method will seem time-consuming and expensive. Just remember how much it will cost to repair a failed internal combustion engine, and you have to think that all questions and doubts will disappear by themselves.

In addition, it should be noted that such a procedure must be done once, and then, when you use the same oil, change it in time, flushing is no longer required.

An economical way to flush your engine during an oil change

The method is dirty, requires thorough preparation, but faster and cheaper than the previous one.

First, drain the used lubricant and remove the dirty filter. Start slowly pouring new product with the filter removed and the oil plug open. Watch what liquid flows out. First, dirty, waste residues of the old oil will be poured out.

As soon as clean oil appears from the socket where the filter is installed, this hole should be closed with something. Continue pouring until a clear, clear liquid emerges from under the drain hole.

As soon as clean oil appears from below, install a new filter in its place and tighten the drain plug of the pan. Now you can fill in new oil in the usual way, up to the mark. This procedure takes 20 percent more oil.

But on the other hand, the engine is washed cleanly. Perform the next replacement a little earlier - after 6-7 thousand mileage. And then as written in the instructions for the car.

Try to use the brands of oils that are recommended by the engine manufacturer, then you will not have to flush the engine when changing the oil. The motor will serve you faithfully and will not let you down at the most inopportune moment.

The question of the need to flush the engine is one of the most acute, relevant and often discussed by motorists. The main purpose of flushing is to clean the engine of various deposits that should not be in it. Accordingly, washing the motor is not only possible, but also necessary. How to flush the engine when changing the oil?

Is it necessary to flush the engine and when to do it?

Carrying out flushing only because it was advised in second-rate car services is impractical and pointless at best, and at worst it can cause serious engine damage. This procedure is relevant to carry out in the following cases:

The car previously belonged to another owner, and the new one has no idea what kind of engine oil was used. In this case, washing is carried out necessarily, but very carefully and delicately. In most cases, they resort to flushing the engine with new oil.
The car owner is changing the lubricant, for example, switching from synthetics to mineral water. Flushing the engine in this case is desirable, but not necessary.
Absolutely new car, its owner takes care of the condition of components and assemblies. In this case, flushing procedures are carried out regularly.
Turbocharged engine or heavily used car.
An old car with deposits under the valve covers and in the pan. The diagnostics carried out will indicate the need for a thorough flushing, and the procedure in this case is carried out with the removal of the cover and pan.

In the first situation, when the new owner of the car does not know which oil was previously used, flushing is mandatory and is associated with the presence of additives in the lubricant. Such additives are not found in cheap and low-quality compounds, respectively, they do not protect the engine from the formation of deposits.

If engine oil is changed when switching from synthetic to mineral water or vice versa, then flushing oil is first poured. In this way, old additives are disposed of: it is likely that they will completely leave the system and will not react with new ones.

Regular flushing of the engine of a new car helps to avoid deposits on parts. If the car is used actively and in difficult conditions, then it is advised to flush the engine even for cars.

Experts do not advise flushing the engine in only two cases:

if the car is under warranty (since it does not provide for such procedures, in case of violation, the car can be removed from service);
if high-quality synthetics or semi-synthetics are poured into the engine.

The difference in flushing gasoline and diesel engines

Diesel engines differ from gasoline counterparts not only in their design, but also in the features of the flushing process and the materials used for this purpose. Only special products are used to flush them: the usual “five-minute” and “long-playing” flushes and other compounds used to clean gasoline engines, in this case, not only will not work, but will also cause irreparable harm.

The oil pump delivers an insufficient amount of oil for the full functioning of the diesel engine. This leads to the need to create a so-called oil wedge, when the rubbing parts of the engine go into a "floating" state. The use of detergent additives, "five minutes" and ordinary oil when flushing can lead to increased friction between parts. The addition of such solutions dilutes the engine oil, due to which it loses all its properties. Deposits that build up on engine walls can vary in composition, so each requires a specific composition to dissolve.

Therefore, when flushing a diesel engine, experts advise car owners to go to a specialized store and purchase compounds designed for power units of this type. In all other respects, the process of cleaning the motor is no different from that carried out with a gasoline engine.

How to flush the motor: oil compounds, cleaners and other chemicals

Today, when changing the oil or when carrying out complex repairs, they resort to four main methods of flushing the engine:

Washing oil. A special tool that is poured into the engine after draining the old used oil. With such a composition, the car is operated in a gentle mode for several days. This option is not the most popular, since it requires additional investments and time: for three to four days, you need to visit a service station almost daily, pay for the work of specialists, and at the same time observe a gentle driving regime.
Washing liquid. The procedure is almost the same as the flushing oil method, but takes less time, since the composition of such an agent is more aggressive and caustic. Liquid is poured into the engine directly into the old oil, after which the engine runs for 10-15 minutes at idle. Then the used oil, together with all the impurities and waste contaminants, is replaced with a new one.
Regular engine oil change. The most gentle way to flush the engine. First, the oil filter and the lubricant itself are replaced, after which the car runs in for 2 thousand kilometers. Then the oil and filter are changed again and the subsequent driving in a gentle mode for 4 thousand kilometers. As soon as this distance is passed, the filter and oil are changed again. After that, you can operate the car in normal mode with regular maintenance.
Dismantling and flushing the engine. The whole procedure is done manually: the mechanics remove and disassemble the engine, after which all parts are washed with gasoline or kerosene. At the same time, diagnostics of the state of the power unit are carried out. This method is considered the most time-consuming and expensive, but it fully justifies itself in cases where it is necessary to overhaul the engine.

The easiest and least expensive way to keep your car engine running is to change the oil and oil filter regularly.

Flushing oil Liqui Moly

Liqui Moly is one of the most common and popular engine flush products available in a wide range.

Oilsystem Spulung

Oilsystem Spulung is a cleaner that can be used to clean the engine and oil system.

The most effective result is achieved when used in vehicles that are operated:

in conditions of aggressive and hard driving;
in regular traffic jams;
in case of untimely replacement of engine oil.

Separately, it is worth noting that this type of Liqui Moly cleaner can be used for both gasoline and diesel power units. Regular use of the composition allows you to extend the life of the motor and keep its parts and components clean. The manufacturer guarantees the following benefits:

The composition gently dissolves deposits and contaminants that have eaten into the walls of the engine without clogging oil filters and pipes.
Extends the life of filled engine oil.
Additives added to the flushing oil not only clean the engine, but also form a protective film on its walls that reduces the friction of parts.
The composition includes additional additives that protect rubber parts from wear and corrosion.
Completely exits the system after flushing is complete.

Oilsystem Spulung High Performance

Available in two versions: for gasoline and diesel engines.

motor overheating;
power reduction;
loss of compression;
untimely replacement of engine oil;
use of low-quality gasoline or diesel fuel.

The benefits of flushing oil include:

Quick cleaning of the entire system.
Neutrality with respect to various materials, including aluminum and rubber, often used in the internal combustion engine system.
The oil has an absolutely harmless composition that does not react with other substances.
The oil does not pollute the environment.

Oil-Schlamm-Spulug

Flushing fluid Liqui Moly, designed to clean the internal combustion engine from sludge, the causes of which are:

rare replacement of lubricant;
frequent and prolonged overheating of the motor;
ingress of moisture or condensate into the system;
the use of low-quality oils and fuels.

The manufacturer guarantees that the use of such additives can reduce noise in the engine and eliminate the knocks of hydraulic lifters.

It is most effective and expedient to use such a washing liquid in cars whose mileage has exceeded 100 thousand kilometers. The advantages of the composition include:

Elimination of soot and black deposits on the pipes of the oil system.
Elimination of deposits accumulating on engine pistons, especially on ring parts.
Cleaning of valves and openings of the oil system.
Cleaning the engine walls from lacquer deposits.
Prevention of oil starvation and costly repairs in the future.

Cleaning liquid from Liqui Moly, which includes additives that quickly and effectively eliminate contaminants located in the most inaccessible places in the oil system. At the same time, the liquid helps to remove carbon deposits accumulated in the piston group. Often Pro-Line Motorspulung is used to clean a manual transmission.

Flushing liquid Pro-Line Motorspulung with special additives for the removal of hard-to-reach dirt

The advantages of flushing liquid:

Reducing the amount of deposits that cannot be completely eliminated from the internal combustion engine.
Extending the life of new engine oil.
Safe cleaning of the engine thanks to the additives included in the fluid.

HI Gear Flushing Fluid

HI Gear is an American-made flushing composition, which contains special additives that do not harm the engine even with regular use for one year. Effectively removes most of the deposits from candles, valves and from the combustion chamber.

Adding liquid to the fuel increases engine power and reduces exhaust emissions. Since the composition of the product does not include aggressive substances, its frequent use does not harm the motor.

Flushing liquid BBF

BBF is a domestic fuel system flushing agent that effectively removes tar deposits and prevents clogging of fuel filters.

It also helps to remove carbon deposits from the valves and combustion chamber. It has an anti-corrosion effect, eliminates fuel detonation, reduces fuel consumption and exhaust toxicity.

Runway Quality Rinse Additive

Runway is a special composition that cleans the engine oil system from spats, soot and other contaminants.

Improves heat dissipation and oil circulation, restores the mobility of compression and oil scraper rings. Does not harm gaskets, oil seals and valve stem seals.

Washes - "five minutes"

Washes - "five minutes" are highly concentrated formulations sold either in small containers or in bulk canisters (already diluted with conventional motor oil). The use of such products, on the one hand, reassures the car owner, because it is impossible to cause much damage to the engine in 5–10 minutes, and on the other hand, it makes one wonder: what can be washed in such a short time?

Some manufacturers refer to such flushes as full-fledged means for decoking the engine.

The composition of the "five minutes" includes special additives that form a protective film on the seals, protecting the rubber from destruction. At the same time, a rather high concentration of aggressive chemicals removes deposits from metal parts.

Danger of "five-minute" washes

Such flushing agents turned out to be so good that they ruined more than a dozen engines. The diagnosis of all power units was oil starvation, which led to damage to the oil pumps, as well as defects in camshafts, crankshaft knocks and piston wedges. After such a motor, it is almost impossible to restore - only if a major overhaul is carried out.

The reason for this is low-quality motor oils, which leave deposits in the engine system in the form of paraffin deposits and clots. Expensive lubricants do not sin like this, taking all the precipitation with them when changing, but untimely replacement of low-quality materials can lead to the formation of a mass that is more reminiscent of plasticine in consistency.

Such a mass can accumulate in the oil pan for years without causing much harm to the entire system, however, when using “five-minute” flushes, it begins to erode, the resulting paraffin clots clog all the filters of the fuel and oil systems, the oil receiver, which leads to disastrous consequences for the engine.

Solar oil is a gentle and safe remedy

Flushing the engine with diesel fuel is a common old-fashioned way to clean the power unit from deposits and dirt. Despite the fact that today most car owners are trying to use special auto chemicals, many advise using diesel fuel: this method of washing the engine is the most gentle and safe.

Advantages of the method:

diesel fuel cleans the engine of slag and pollution;
extends the life of the engine and the car as a whole;
protects against the appearance of new deposits;
creates a favorable environment for the further use of engine oil.

Many car owners do not classify diesel fuel as flushing materials, considering it to be fuel. Despite this, it is a very effective engine cleaner that can even be used to service older ICEs.

How to properly clean the engine with diesel fuel - video

Acetone is a popular car engine cleaner.

The use of acetone is an equally common and used method for flushing an engine.

The addition of such a composition to the engine increases the octane number of gasoline, cleans metal parts from soot and deposits, and removes moisture from the fuel. However, experts and car owners with many years of experience in operating a car do not advise pouring a large amount of acetone in order to avoid engine breakdowns.

Kerosene

Flushing the engine with kerosene is a very controversial method: many car owners are of the opinion that it can lead to scuffing. Add a small amount of kerosene to the old oil and leave the engine to idle for a few minutes. After draining the kerosene, it is advisable to completely fill the system with oil and leave the engine to idle again.

The disadvantage of this method is that kerosene, due to its fluidity, can enter the intake manifold. The subsequent start of the engine with kerosene in the manifold can lead to serious damage.

Kerosene washes away all contaminants and slag formations in the fuel and oil systems, but it does not dissolve them, which is why all the dirt remains in the oil, in a suspended state. Accordingly, after starting the engine, this suspension will go through the system and can clog the filters and oil receiver.

transformer oil

Cleaning with transformer oil is the oldest method of washing engines, which was mainly used on GAZ-51 cars.

Today, some car owners resort to it, claiming that the composition washes away all engine deposits in a few minutes and prevents the appearance of new ones. However, experts do not recommend using transformer oil, arguing that it can damage the internal combustion engine.

Solvent

The engine can be washed with a solvent both in service conditions and independently. To carry out the procedure with your own hands, you need to purchase the tool itself and additional tools - a fuel filter, hoses and a fuel pump.

When flushing in this way, it should be remembered that the cleaning compound can adversely affect engine oil, despite the fact that manufacturers say that the properties of the lubricant remain even after solvent enters it. For this reason, such flushing is carried out only before changing the oil. In addition, the solvent can lead to the failure of spark plugs, so after using it, the entire kit is changed.

Petrol

Another way to flush the engine, which, despite its effectiveness, is often perceived with hostility by car owners. In this case, several liters of gasoline are poured into the engine and left for 10-30 minutes, then the fuel is drained and a new portion is poured. The procedure is repeated until the drained gasoline is clean.

Under no circumstances should the engine be started during such flushing!

The remaining gasoline in the system evaporates without mixing with the new oil and without causing any harm to the internal combustion engine. Experts do not advise using this method, and if you resort to it, then only if you switch to another type of engine oil.

Engine flush process

Flushing the engine is a sensitive procedure, during which you can seriously damage the power unit and the oil and fuel systems. Before proceeding with it, it is necessary to consult with a specialist in a car service and diagnose the vehicle. Such a check allows you to assess the condition of the car and the need to change the engine oil.

Engine flushing is carried out as follows:

The engine warms up, after which the used engine oil is drained. To do this, it is advisable to drive the car onto a flyover or raise it on a lift with an inclination to one side - this will drain all the grease from the system.
The oil filter is changed and new oil is poured. The car is operated in a break-in mode for two days.
Two days later, the oil filter and lubricating fluid are changed again.
After repeated break-in, you can drain the engine oil and proceed to direct flushing.
The flushing liquid is poured, the engine starts and idles for 10-15 minutes.
The flushing agent is completely drained from the system.
Then low-quality engine oil is poured in, the engine starts again and runs for half an hour at idle. This is done in order to completely remove flush residues from the system.
The used oil is drained, and high-quality lubricant is poured into the system, which will be constantly used in the future.

It is pointless to flush the engine without changing the oil filters: all the carbon deposits and dirt that will be washed off will accumulate in the filter, and when new engine oil is filled in, they will again enter the system. Therefore, after carrying out this procedure, it is advised to change all filters in the system.

Engine flush - video

Gentle flush - a gentle way to flush the engine

The most preferred option for cleaning the engine from accumulated deposits and soot. With a gentle method, special flushing agents are poured into the engine, and then the car travels 100-150 kilometers. During this time, the flushing will have time to gently and carefully clean the engine without causing any harm to it.

After the desired effect is achieved, the old oil is drained, the oil filter is changed and new grease is poured. The result of such a procedure will be obvious: the engine will start to run softer, the car will become more dynamic and obedient.

Fast engine flush

It is carried out in cases where engine cleaning and oil change must be carried out immediately, however, it is not the most preferable and safe option. They resort to it when there is metal shavings in the engine oil, when it is heavily contaminated, or in other situations where it is impossible to carry out a gentle flush.

The disadvantage of fast flushing is the negative effect it has on engine parts. In its effect, it is very similar to the result of using acid: it not only destroys carbon deposits and dirt, but also removes a thin layer from parts. Such regular exposure, of course, will not lead to anything good, therefore, quick flushing is resorted to in the most extreme cases.

Do-it-yourself engine decarbonization

Car engine decarbonization is a method of cleaning the system from carbon deposits formed as a result of operation. In car services, it is called a major overhaul of the internal combustion engine and, accordingly, they charge round sums for it. However, you can do the decarbonization with your own hands: the main thing is to know what exactly and how to do it.

There are several ways to deal with deposits, the most effective of which are:

cleaning with water or steam;
cleaning using special compounds - for example, "Lavra";
cleaning with a mixture of kerosene and acetone.

Such procedures can be carried out with your own hands, without resorting to the help of specialists.

Myths about engine decarbonization

For all the time of its existence, this procedure has acquired a huge number of prejudices and myths, the most common of which are:

Using a cleaning agent will give the pistons a shine. This is far from the case: of course, it is possible to achieve mirror purity, but no one will guarantee that the car will then start.
You can decarbonize without changing the engine oil. One of the most dangerous misconceptions: after cleaning the engine, the oil must be changed without fail, otherwise such a procedure is fraught with breakdown of the internal combustion engine.
It is impossible to carry out decarbonization on your own. The whole procedure can be carried out in an hour and a half without much effort on the part of the car owner.

Method for cleaning engine parts with water

The following materials are needed to decoke the engine with water:

dropper;
tee;
hose;
distilled water.

The dropper is connected to a bottle of distilled water, after which the resulting system is connected by a hose to the BDZ. The liquid from the bottle should only flow when the suction is on, and the dripping frequency should be about three drops per second.

After installing an impromptu dropper, the engine is idling, after which the bottle is attached under the hood and the car is driven for several kilometers. In most cases, the car is very sluggish at first, but then accelerates significantly.

The first effect should appear after 100-150 kilometers with a dropper. To achieve a complete cleaning of the engine, it is necessary to drive with a bottle of water at least 500 kilometers. A side effect of this decoking is a reduction in fuel consumption.

Is it possible to decoke the engine with water - video

Cleaning the engine with Laurel before changing the oil

Laurel is a special liquid for decarbonizing. You can get it at any automotive store for a bargain price.

Decarbonization with this tool is carried out only before changing the oil and consists of the following steps:

All spark plugs are removed.
The valves are set to one position. You can use a piece of thick wire for more accurate measurements.
About 45 ml of Lavra is poured into each cylinder.
The candles are back. Inside, it is desirable to create conditions similar to a steam bath.
The fluid stays in the engine for 4-6 hours.
After the specified time, the candles are unscrewed and the starter is started. It is advisable to carry out three or four starts lasting 10–15 seconds with the accelerator pedal fully depressed. This removes excess fluid.
All parts return to their place, the engine starts.
The used oil is drained from the system, everything is thoroughly washed and new oil is poured in, air and oil filters are installed.

To evaluate the change in compression, it is enough to drive about one to two kilometers. If everything remains the same, then the problem lies in the engine seals. And if the compression increased, then the decarbonization was carried out successfully.

We decoke the engine with Laurels - video

Decarbonizing with a mixture of acetone and kerosene

A similar composition is used to decoke the engine in the most extreme cases, when the car's mileage is more than 400 thousand kilometers and the thrust is completely gone.

Acetone and kerosene are mixed in a ratio of 2:1. For a 4-cylinder engine, 300 ml of mixture will be enough.

Before decoking, it is advisable to warm up the motor and cool it down a bit - it should be warm, but not hot, otherwise the acetone will start to boil.

Decoking is carried out very simply:

Candles are unscrewed, the prepared mixture is poured into their holes.
Then the candles are returned to their place, and in this form the engine is left for 10-12 hours.
After the specified time, the mixture of kerosene and acetone is blown out of the motor by starting the starter.

Before proceeding with the distillation of the mixture from the engine, several conditions must be met:

Any devices and wires that can spark when starting the starter are turned off.
The engine is lined with rags - they will protect other components and parts from dirt.
A test drive at high speeds is being carried out.

After the decarbonization, the engine oil must be changed, and it is advisable to do this several times. New filters are also installed.

Engine decarbonization with kerosene and acetone - video

Risk of decarbonization

Cleaning the engine from soot allows not only to eliminate all impurities, slag and dirt, but also washes away a thin oil film on the cylinder walls. The first start-up of the engine after decoking occurs almost “dry”, which can lead to rapid wear of the piston rings and to the so-called scuffing. The use of special compounds will help to avoid this - the same Lavra, which creates a thin protective film on the cylinder walls, which reduces the re-formation of carbon deposits and prevents scuffing.

The nuance of the decarbonization is the location of the cylinders. It is easiest to carry it out on conventional in-line internal combustion engines, but in the case of opposed or V-shaped valves, the procedure becomes more complicated: access to spark plugs in such engines is more difficult, and the piston must be almost completely covered with liquid.

The biggest and most unpleasant disadvantage of this procedure is its duration. Of course, you can resort to a quick flush of the engine, but it is not always safe for the combustion chambers and cylinders and often cannot completely remove all deposits.

In general, flushing a car engine is a very effective procedure. However, it is only useful when it is really needed. In other situations, flushing “for prevention” and “for the beauty of the engine” can lead to not the most pleasant consequences.

During the operation of the vehicle, a large amount of dirt and soot accumulates in the engine compartment - and it is impossible to completely protect the engine from them. But deposits can be removed by technical flushing. An engine flush is a procedure that removes contaminants from the working area of the power plant using special flushing fluids. However, among motorists there are often disputes about the need for this procedure. According to opponents, special cleaning of motors is not required - for this it is enough to buy synthetic motor oils with detergent additives. Nevertheless, let's try to figure it out - do you need to flush the engine when changing the oil or can it be excluded?

When to flush your engine

Flushing fluid inlet

Have you ever bought a used car? No matter how reliable it may seem from the outside, no one, except the seller, can say with certainty that it is splashing under the hood of such a vehicle. You can believe the convincing words of the seller and continue to “roll” the old oil. But, unfortunately, excessive trust can lead to complex and costly repairs. The fact is that people, trying to sell the car as profitably as possible, no matter how old it is, tend to confuse the buyer. By pouring a more viscous oil under the hood, they achieve a reduction in noise from the operation of the power plant. Pleasantly rumbling motor - well, who doesn't like this? Naturally, a ten or fifteen year old car with a silently running engine will seem attractive enough. But if the oil is not selected correctly or the quality of the mixture does not meet the requirements, prolonged operation of the motor with such a liquid can disable it for a long time.
In order not to fall into the tricks of scammers, after buying a car from your hands, the engine must be flushed without fail.

Also, the relevance of the procedure arises when a transition is made to a motor fluid with a different chemical composition or viscosity properties. In addition, when you purchase oil from another manufacturer (even with the same parameters as previously filled in), it is still worth flushing the engine compartment. The fact is that liquids having a different chemical composition cannot completely mix and begin to function effectively. Moreover, the interaction of additives of different types can lead to the onset of oxidative reactions that will affect the condition of the entire engine compartment.

Do you need to flush the engine when changing the oil if you are a fan of a sporty driving style? Yes. And the explanation is simple: running the engine at excessively high speeds leads to an increase in the amount of unprocessed fuel that settles in the catalyst, smokes and causes the exhaust pipe to burn out. In order to prevent this effect, it is necessary to clean the motor system at each change of engine oil. The same situation may arise if the vehicle is constantly subjected to large overloads.

When is rinsing not needed?

In order to finally understand the problem, let's get acquainted with the situations when flushing the engine when changing the oil is not required:
- You are the sole and first owner of your vehicle. At the same time, you or other users of the car observe a calm driving style that does not allow work at high speeds, abrupt starts and braking.
- Vehicle maintenance is carried out regularly, in compliance with all the requirements of the automaker, including the use of a motor fluid that is acceptable in terms of chemical composition and viscosity.
- The car is not used in the mode of increased motor load.
- The vehicle is serviced not by the owner himself, but by highly qualified car service workers who do not raise doubts about the results of their work.
- You have never topped up the “first available” engine fluid under the hood of your car for any problems on the road.
How to flush an engine?

The procedure for cleaning the engine compartment is a rather serious and time-consuming task. Why? If the flushing composition is not selected correctly, at least the seals and gaskets may fail. We will talk about more serious consequences of an incorrectly performed procedure a little later.

In order not to aggravate the situation, but, on the contrary, to reanimate the motor, it is recommended to place this responsibility on the shoulders of an experienced auto mechanic.
He must have qualified knowledge in the field of engine compartment maintenance, be able to determine the condition of the vehicle and select a gentle but effective “medicine” for cleaning. It is also recommended to diagnose the machine's engine before changing the oil.
If you think that engine flushing should be carried out for prevention, then you are mistaken. The use of alkali-containing liquids causes devastating damage to some structural elements of the power plant, which subsequently need to be replaced with new ones.

In general, flushing the engine before changing the oil is carried out in the following sequence:
- in the upper part of the engine compartment, the oil filler cap is unscrewed, in the lower part, the plug is removed. All waste fluid must be drained from the vehicle.
- the drain plug is installed back, the liquid used to clean the internal surfaces of the engine installation is poured into the engine compartment. The time of its stay in the car engine and the method of its operation at this stage is determined based on the type of detergent used.
- then the technical fluid is drained from their power plant by re-removing the drain plug. The oil filter is removed.
After completing all the steps, a new oil filter is installed and fresh protective grease is poured.

Washing methods

If you decide not to resort to the services of professionals, but on your own to maintain the engine system and carry out the procedure for cleaning it, then changing the oil should begin with determining how to flush the engine. There are the following types of detergents:

flushing oil

It can be difficult to find high-quality flushing oil for an engine in free sale: due to its not great popularity, flushing oils bring little profit, so small car dealerships do not buy them. How do they work? Yes, it’s very simple: the old lubricant is drained from the car, the engine flushing fluid is poured, and then the vehicle is operated with it in a gentle mode for a specified time. This method of washing the engine has the main advantage - cleaning allows you to effectively and efficiently remove all contaminants from the working area. But there are also negative aspects of using flushing oils: it can take up to two days to rid the motor of third-party debris and the remnants of a low-quality mixture. At the same time, it is strictly forbidden to operate the machine in conditions of large overloads. Flushing oil for the engine has only one role: it flushes out foreign deposits, but cannot provide the required level of protection against high friction forces.

Also, the seals of the power plant can also suffer from the flushing liquid: a large amount of alkali destroys their structure.

Oils are of two types:
- prolonged exposure. They are poured into the engine compartment for two days and allow you to effectively deal with contamination of mechanisms. At the same time, all 48 hours during which the oily liquid “conjures” under the hood, the driver must operate the car to the maximum, but in a quiet mode: no sudden starts and stops, high revolutions and high speeds. Driving should be smooth and measured, while the maximum speed of the car should not exceed 60 km / h. 40 km / h is the most ideal option.
- fast action. "Instant" effect engine flush oil allows you to clean carbon deposits and debris from the working area in 10 minutes. It is poured into the engine compartment after the mining is removed. An engine with such a liquid should work for the specified time only at idle - it is strictly forbidden to press the gas pedal, increasing the speed.
All oils designed for cleaning mechanisms consist of a high-quality mineral base and additional additives. Some of them - more aggressive - are involved in the direct dissolution of contaminants; while the second - sparing - is used to neutralize the harmful effects of components on internal combustion engine parts.

Used oil additives

Engine oil in the engine

If it is not possible to clean the engine with an oily liquid, then you can clean it with the help of special additives: it is impossible to make a mistake in how to use them correctly - additives are poured into the engine compartment in their pure form. In this case, there is no need to merge the processing. Additives are mixed with the main protective material and clean the motor during its operation. Such a washing base is poured for a certain amount of time before the subsequent replacement of motor lubricant. The main advantage of this method is to maintain a high degree of protection of motor units from temperature and mechanical factors while simultaneously removing polluting particles and soot from the working area. Additives do not harm oil seals, gaskets and other components of the engine compartment.

Fresh washing oil

Oddly enough, but the engine flush can also be carried out with the help of the oil that you are going to fill in the engine after changing the mining. The main condition is that it must contain detergent additives. How to do it? First of all, you need to drain the old fluid and pour a little new engine oil into the engine - a couple of liters will be enough (the main thing is that the oil level pressure light goes out). Then we start the car and leave it to idle for 10-15 minutes. After the time has elapsed, drain the lubricant, change the filter and fill in the final protective material in the required volume. This method cannot be called economical - nevertheless, you need a couple of “extra” liters of by no means cheap material, but it allows you to flush it safely for the engine, which will not entail serious malfunctions in the system.

Folk ways

Motorists with great experience in the field of servicing their own vehicle do not recognize the above methods of flushing the engine, but prefer to use the “old-fashioned” methods. Diesel fuel or kerosene can be used to dissolve contaminants and then remove them from the engine compartment. Such funds quickly soften deposits and do not hit the pocket.

Flushing the engine with diesel fuel before changing the oil allows you to clean the surface of the parts, flush the channels and lubricate them.
Opponents of this method claim that diesel fuel cannot achieve a 100% result, but, unfortunately, even professional tools do not guarantee such an effect. Especially if the pollution accumulated over several years.

Cleaning the engine with kerosene or diesel fuel is done according to the following scheme:
1. Drain the used oil, remove the old filter and install a new one.
2. Pour a few liters of flushing agent into the motor neck (without clogging the drain plug). This procedure will remove the remnants of old oil and remove small debris.
3. We close the cork in the pan and fill under the hood with the right amount of diesel fuel or kerosene.
4. We start the engine for 10-15 minutes.
5. We mute him.
6. Drain the flushing mixture, remove the now no longer new filter.
If the drained fluid contains a large amount of dirt and contaminants, the procedure can be repeated. In order to flush the engine with diesel fuel or kerosene before changing the oil, it is not necessary to use these substances in their pure form. They can be mixed with engine oil in a 1:1 ratio. Such an engine flush when changing the oil will be more gentle for the power plant.

The disadvantage of this method lies in the need to purchase two or more oil filters. However, in order to save on flushing savings, you can purchase a cheaper option.

Problems after procedures

Modern motorists prefer to get information about vehicle maintenance from the Internet. A large number of forums and advice from “experienced” drivers not only advise whether it is necessary to flush the engine when changing the oil, but also motivate you to take measures to improve engine performance in your own hands. But such an initiative may backfire for some cars. And the reason for this lies in the age of the car and the conditions of its operation.
If the owner of the vehicle has neglected the recommendations of the automaker, used low quality oils, different viscosity properties, repeatedly violated the lubricant change interval, or used the car for a long period in harsh operating conditions, engine cleaning can cause irreparable harm.

The deposits accumulating in the engine compartment sump do not in themselves have a negative impact - they only concentrate on the parts of the power plant and reduce the useful life of the oil lubricant. Is it worth talking about what happens inside such engines after adding detergent bases to them? There begins the instant process of washing off and dissolving long-term accumulations. As a result, during the flushing of the cleaning agent, the central line of the lubrication system becomes clogged. It turns out that the engine in which the oil is filled does not receive it in full. And this is fraught with jamming of the crankshaft. It is often possible to correct the situation with blockage of the main channels only mechanically - by partially or completely disassembling the power plant of the machine.

Summarize

Flushing the engine when changing the oil is definitely a necessary procedure. Even if you do not subject the car to large overloads, deposits accumulate inside it. Albeit in small quantities, but they are present. And sometimes it is impossible to wash them with ordinary motor oils. In order to clean the internal surface of the engine installation, special detergent components are used. But it is impossible to immediately determine whether the procedure for their use will have serious consequences or not. Especially if you are servicing a car bought from your hands. Only an experienced auto mechanic can tell about the state of his propulsion system. Therefore, after purchasing a used vehicle, it is recommended to take it to a service center for diagnostics and preventive maintenance.

« The debate about the need to flush the engine has recently escalated. And all due to the fact that more and more used cars appear on the market than new ones. Panacea? Or harm? Are there many engine oil system flushes that are really effective? Let's deal with everything in order.»

Flushing into oil they are poured before replacement, mixing it with a lubricant that has already exhausted its resource, and let it work for some more time (most often 5 ... 10 minutes). Then the resulting slurry is drained and fresh oil is poured into the engine. All of these products contain cleaning additives similar to those found in conventional motor oil or only solvents. It is this fact that causes many doubts whether such a composition can wash off the sludge accumulated over the years, the products of combustion of oil and fuel, in a few minutes or at least a couple of days of work.

You can flush the engine with several means - oil or liquid with which you need to ride for a while. But the most popular one is 5 minute engine flush. Since the last two drugs are used most often - because of their ease of use, we will consider their effectiveness in more detail.

How flushing works

Quick (five-minute) flushes of the engine lubrication system work according to a fairly simple method. This composition is poured into the lubrication system, after which the motor should run for about 5 to 10 minutes, and the resulting mixing liquid is drained. The composition of the tool after flushing, a large (so-called shock) dose of detergent components. Which in a short time are able to wash old dirt, scale, deposits and other debris. This is evidenced by numerous engine flush tests. Their results can be found in sufficient quantities on forums and various resources on the Internet.

Sometimes on the network you can find conflicting reviews about a particular tool, the essence of which boils down to a negative action. Often, however, this attitude is the result of improper flushing. If the product contains aggressive substances, then with their prolonged exposure to rubber seals, there is a risk of damage to the latter. And this leads to an emergency. Therefore, before using a particular tool, you must carefully read the instructions for its use, and act in accordance with it.

Looking ahead, it is worth noting that the effect of using such flushes is indeed observed, however, it not as fantastic as their manufacturers say in the instructions. Therefore, the feasibility of use remains in question.

How is the engine flushed?

Despite the fact that most flushes act similarly, they still fall into several classes. Among them:

"Five Minutes". As a rule, they are based on an organic solvent, which allows you to quickly, at an accelerated pace, wash off dirt and deposits. The advantage of such funds is the high speed of action. Disadvantages - together with dirt, the “five-minute” can wash off grease from working mechanical pairs. As a result, burrs may appear on the parts. Therefore, such drugs can only be used at idle speed of the engine.
Soft engine flushes. They are added to the oil approximately 100 ... 300 kilometers before the moment. They act more sparingly than previous products, since their base is made from calcium sulfonates (some kind of soap and similar detergents). In addition to the base, the composition includes dispersing additives.
A mixture of the first two options. It can be a variety of compositions containing both solvents and detergent components with additives. As practice shows, universal tools are not as good as special ones, sharpened to solve a specific problem.

There is another class of washes that can be conditionally called popular, but they also belong to the “hard” class. For decades, before the advent of modern chemicals, motorists added various solvents to clean the oil system, including acetone or solvent. Such a solution takes place, but with some limitations:

The effect of such a tool is very limited in time. Their work is allowed literally within 3 ... 5 minutes. Naturally, during this time they will be able to wash only surface deposits.
In no case should you increase the speed when there is such a flush in the engine!

As an example, we list several popular compositions belonging to certain classes (naturally, their true number is many times greater).

"Five Minutes" - Hi-Gear-Motor Flush HG2214, and "EL TRANS Cleaner Oil System".
Means of long action -.
Universal means -, and.

Each of the listed washes has its own characteristics of composition and use, so reading the instructions is a must!

Remember that all of the listed remedies are preventive, and are not intended for. And also, that before filling in new permanent oil, it is advisable to purge the system with a compressor or use a vacuum pumping apparatus in order to remove all remnants of the oil mixture in the engine (after traditional draining, there are always about 200 ... 300 grams).

Rating

Currently, a huge number of different flushes for the engine oil system are being sold on the shelves of car dealerships. Having summarized all the information about the most popular funds, it turned out to create a rating of 10 funds. The search for effective engine flushes was based on feedback from use as well as their performance. We offer a short review in order to find out the real effectiveness and choose the best and most effective one.

It is positioned as a soft flush of the engine. Laboratory tests have shown that the composition of the product includes elements that also occur in fresh. In addition, detergent and anti-seize properties are characteristic since there are calcium, magnesium, boron, zinc and phosphorus. Due to this, the surface of engine parts is reliably protected from the decomposition products of old oil present in it.

The can is enough for pouring into 5 liters of oil. Flushing must be filled in 100 ... 200 km before changing the oil. At the same time, remember that during the period when the flush is flooded, you can not use the engine for more than two-thirds of its power (drive in a gentle mode).

Sold in 300 ml cans. Its price for the spring of 2018 is 550 rubles. Article - 1990.

Advantages:
Balanced composition, the presence of gentle additives and washing elements;
Has anti-seize properties;
Possibility of use even in old engines.

Flaws:
Small volume of the can;
Relatively high price.

This is a classic American quick engine oil flush. The instructions indicate that it must be poured into the system for 10 minutes. It can also be used as a means for restoring compression and oil scraper rings, as it does not contain substances that destroy rubber or plastic. Additionally, there is a so-called "friction winner", (Energy Release), which is believed to contain chlorinated paraffins.

In addition to directly cleaning engine elements, High Gear provides good heat dissipation, which has a beneficial effect on parts, preventing them from heating up significantly during operation. The effectiveness of the oil flush application depends very much on the specific conditions of use and the condition of the engine.

It is sold in a 444 ml can, which is enough for an oil volume of 5 liters. Its price is about 450 rubles. The article for purchase is HG2214.

Advantages:
Positive effect on rubber and polyurethane products;
Can also be used in a turbocharged engine;
The use of flushing the oil system of the old engine is envisaged.

Flaws:
Requires a lot of precise work of the additive over time;
Efficiency is highly dependent on the condition of the engine.

This is a 5 minute engine flush that can be used on both petrol and diesel engines. The manufacturer reports that the product can also be used in motors operating under heavy load. This creates the effect of a protective layer that reduces friction.

The key to a positive effect is the use of flushing the lubrication system of the Liquid Moli engine on a regular basis for preventive purposes, that is, only in slightly contaminated cases. In engines with severe contamination and / or with improper use of the product, motorists note low efficiency.

Laboratory test studies have shown that the following elements are indeed included in the washing composition - calcium, magnesium, boron, zinc, phosphorus. And also the absence of any aggressive chemical elements. This means that the flush can be used as an all-rounder and not just for flushing the oil system. That is, the composition is able to effectively counteract the occurrence of scuffing and engine wear.

It is sold in a 300 ml can, which is recommended to be dissolved in 5 liters of engine oil. Its price is 300 rubles. Article to buy - 1920.

Advantages:
Relatively low price;
Flushing can be used to flush, protect engine components and its oil system;
Non-aggressive chemicals.

Flaws:
An exceptionally preventive drug.

Another quick cleaner (10 minutes) from the German company Liquid Moli. Able to effectively wash the combustion products in the elements of the engine oil system, but only with a small layer of deposits. Especially the fact that after the end of the work it completely evaporates, so there is no need to worry that the residues will mix with the new oil. It can also be used to flush manual transmissions.

The chemical analysis showed that the washing contains not only cleaning elements (Ca - 780 mg/kg), but also antiwear additives (Zn - 2181 mg/kg, P - 2179 mg/kg) and an organic solvent. Therefore, such a quick flush can effectively and gently clean the engine.

It is sold in a 500 ml can, which is enough to fill up to 5 liters in a system, the price is about 450 rubles. Its article number is 7507. And, what is remarkable, it can also be found in canisters of 1 and 5 liters ..

Advantages:
Different volume of packages;
The versatility of the tool;
Quite a lot of anti-wear additives.

Flaws:
Efficiency deteriorates as the deposit layer of oil and fuel combustion products increases.

According to the declared characteristics - a highly effective soft express flush for engines with high mileage and pollution (designed to idle for 5-7 minutes). In addition to cleaning, it eliminates coking of oil scraper and compression rings. Compatible with all types of oil, safe for rubber and plastics. Can be used in gasoline and diesel engines, including those with turbocharging.

However, the tests and chemical analysis carried out did not show any fantastic results. In particular, the composition does contain a detergent additive - calcium, but what is most surprising is that its content is lower (only 1682 mg / kg) than that of the similar agent HG2214 (2247 mg / kg). So, using a miracle as a cleanser is not worth hoping for, except that the main effect is achieved due to the solvent, which the manufacturer does not mention in the composition.

Sold in a 444 ml can. Its price is 360 rubles. Order number - HG2204.

Advantages:
It is permissible to use for gasoline and diesel engines, including those with turbocharging;
Compatible with both mineral and synthetic oils;
Safe for rubber and plastic;
It can be used as a prevention of ring decoking.

Flaws:
Mediocre indicators in terms of the level of cleaning from carbon deposits, slags and oxidation products from the channels of the lubrication system.

English synthetic oil flush additive. A distinctive feature of which is that it can be used as a quick and as a soft rinse. In the first case, the composition is poured into the engine, which runs at idle for 10 minutes. After that, you can change the oil. In the second case, the agent is poured into the engine a week before the replacement procedure. However, in the latter case, the car should simply stand, you can’t ride it!

Application for gasoline engines is envisaged. Has a thick consistency. Chemical analysis showed that the drug is based on motor oil with a concentrate of additives. Moreover, most of all it is detergents - 3509 mg / kg, although there are much more extreme pressure than in any other agent (2572 mg / kg of zinc and 2611 mg / kg of phosphorus).

The use of such detergent-dispersant additives instead of organic solvents has its own nuances. What is achieved is not the dissolution of oil deposits and dirt, but their exfoliation. And here lies the danger! If the system filter is in order, it will be able to catch large pieces of dirt. Otherwise, it will move on through the system. Therefore, it is absolutely impossible to use such a tool in heavily polluted engines! The best option is to use the rinse as a 10 minute cleaner.

Flushing is carried out in a 400 ml cylinder which is enough for 5 liters of oil. The price of such washing is about 400 rubles. Article - PEF400M.

Advantages:
Better efficiency in removing deposits and dirt;
Neutralization of harmful acids;
Frees sticky piston rings.

Flaws:
The impossibility of using the product with a clogged oil filter and / or a very dirty oil system.

Hi-Gear-Engine-Tune-up-HG2202

This is a mild cleaner for the engine oil system, the main composition of which is a pure solvent (oil distillate) since it has practically no third-party additives (silicon - 18 mg / kg and phosphorus - 7 mg / kg). Therefore, it is similar to the action of “grandfather's” acetone. It makes it possible to clean the crankcase ventilation system, restore the throughput of the PCV valve, clean the piston rings from carbon deposits. It is recommended to pour only into semi-synthetic and mineral oils.

An effective tool can only be for cars with medium mileage. On old engines with high oil consumption, it is recommended to fill in and drive with it for 100 ... .200 km before changing the oil.

But the composition of this drug is still questionable. After all, like washing an engine, having a meager number of additives and only traces of hydrosilicates will be able to cope with the declared characteristics. So, most likely, this flushing of the engine lubrication system is a representative of the “empty” class. That is, it absorbs dirt floating in the engine and merges when changing the oil.

For a better effect, there is a need to combine this drug with another one that has an additive package. A 946 ml HG2202 bottle costs about 500 rubles.

Advantages:
Multifunctionality;
Possibility of application in the worn-out engine.

Flaws:
No detergents or anti-seize additives.

This 5 minute engine flush is made in Russia by AGA. Designed to clean CPG parts from carbon deposits and varnish. It is safe for oil seals and gaskets. The manufacturer claims that it was tested on VAZ cars and allowed the car to be operated for 300 thousand km without.

Contains a metal conditioner. In addition to cleaning channels and other elements of the system, it also increases engine compression. It is used only before the next change of engine oil.

Real tests have shown that it does contain elements of calcium in an average concentration (1772 mg / kg). Accordingly, washing really has a washing effect, although it is not so pronounced. But in general, it is quite possible to use it, the main thing is to observe the time frame.

Sold in a 444 ml can. Its price is 300 rubles. Article - P023RU.

Advantages:
Low price with an average volume of the cylinder;
Gentle action on rubber and plastic parts;
The presence of elements of detergent additives.

Flaws:
Useless when used in an engine with high mileage.

Produced on the territory of the Russian Federation. In the declared abilities, it is noted that this flushing of the oil system is universal. Thus, it will not only remove carbon deposits and deposits, but also protect the surface of engine parts from scuffing. Soft flush Lavr according to the instructions is poured into the system approximately 100 ... 200 km before the planned oil change.

However, the performed laboratory analysis showed that the washing contains not the additives themselves, but only their elements. In particular, traces of calcium, zinc, phosphorus and a very meager amount of boron were found. Therefore, we can conclude that such flushing can be harmful to the engine over such a long section of the road as 200 km. Therefore, it is recommended to use it either at shorter distances (which is more appropriate) or as a classic “five-minute” when working at idle. But with such an action, there is another additive from laurel, a 7-minute solvent-based.

“Soft” Laurel Motor Flush Soft is sold in bottles of 330 ml, which is enough for an oil system of 4 ... 6 liters. Its price is 200 rubles. Article - LN1005.

Advantages:
cheap;
Compatible with all types of motor oils.

Flaws:
At a distance of 200 km, judging by the composition, it can only harm the engine.

Another American tool related to quick flushing of oil channels, and according to the instructions, it must be poured into the engine for up to 10 minutes. It is positioned as an effective drug that is safe for all engine elements, including rubber and plastic. Among other functions, it increases compression, and can also be used to decoke oil scraper and compression rings. Therefore, car owners, in the hope of a miraculous effect, buy it.

However, practical tests of this washing showed that it has very mediocre properties. In short, it does not fully correspond to the manufacturer's statements. From the positive test results, it is worth noting that BG 109 does increase compression slightly, and can also be used for incomplete ring decarbonization. It is used only as a prophylactic. This brand has other tools for solving the problems of flushing and rebuilding engines. For example, it is recommended to use BG 110, which is an additive to engine oil and enhances its properties, prolongs service life, keeps the engine clean and performs. Therefore, it is desirable to use these two described means in pairs.

It is sold in a 325 ml can, a 948 ml canister and a small barrel with a volume of 18.9 liters. A small can is enough for a system with a volume of 4 ... 5 liters of oil. Its price is 500 rubles. Article - 109.

Advantages:
Increases compression;
Use for decarbonizing rings;
Sold in packages of various sizes.

Flaws:
The efficiency of cleaning the oil system is greatly “bloated” and requires the use of an additional agent;
High price with other equal characteristics with analogues.

Conclusion

Hundreds of flushes of the oil system, costing from 200 to 500 rubles, can only be exposed in chemical analysis laboratories. And you, dear car owners, have only to rely on the honesty of the manufacturer or rely on the reviews of other users of already tested proven products and engine oil system flushes.

Therefore, even if you buy an original, and not a fake drug, you should not expect a miracle from it. Yes, the chemical composition will remove some soot and soot from the engine, but a large amount of them will remain in the power unit. After all, as you can see, not all products are as good as they are advertised.

An interesting fact is that the manufacturer does not hide much of the direct function of his liquid. It is in the very name on the case of the five-minutes that it means “flushing”, and not “washing”. We advise you to pay attention to the translation of English and German words. Flush - “flushing”, “flushing”, “flushing”, cleaner - “cleaner”, “cleaning”, Spülung - “flushing”, “cleaning”, “flushing”.

: detergent, extreme pressure, antioxidant, etc. When using the recommended oil and changing it regularly, there should be no deposits or contamination in the engine. Wear products merge with used oil from the engine during replacement. However, in practice, everything is not quite so.

It happens that motorists use several oils of different manufacturers or types in series. As a result, various types of oils are mixed in the motor, which leads to the formation and loss.

During overheating, the oil irreversibly loses its properties, decomposing, which also leads to engine pollution. This applies to worn engines, because in them hot exhaust gases most often break through into the crankcase.

As a result of these reasons, the oil gradually begins to coke, indelible deposits form on the walls of the crankcase, cylinders and other surfaces up to the complete clogging of the oil channels, which can lead to.

With each change, part of the used oil (about 10% of the total volume) is not physically drained from the power plant and remains inside. When interacting with fresh oil, the old oil causes accelerated oxidation, which reduces the service life. As a result, fresh does not have time to work out its resource and exacerbates the situation with deposits.

This may be the condition of the engine after poor care

How to flush an engine?

The procedure for flushing with flushing oil is extremely simple. To flush the engine, you must first drain the old, used oil, then flush it. The engine starts and runs for a few minutes at idle. Washing time is indicated in the instructions. During flushing, it is forbidden to increase the speed, since flushing does not have sufficient lubricating properties. After that, everything is completely drained and fresh, working oil is poured.

There are so-called “five-minutes” - products packaged in small bottles that restore the washing properties of used oil. They are added directly to the motor before replacement and let it run for five minutes. Further, the process proceeds as with flushing oil. just before adding new oil.

Flushing liquid - "five minutes"

Five-minutes have good detergent properties, they easily remove dirt from the crankcase walls.

When working with five minutes, strict adherence to the instructions is mandatory, because this is an aggressive drug. If the instructions say that the engine should be flushed for exactly 5 or 10 minutes, you do not need to drive the engine for half an hour, the seals may not survive this. If you stay five minutes in the engine for longer than the specified period, you can damage the power plant.

As already mentioned, when draining the oil, about 10% of the volume remains in the motor, and, accordingly, the components of the flushing fluid. It is not possible to remove them completely without disassembling the engine, which means that they will have a negative effect on fresh oil.

The use of "five minutes" is allowed in rare cases with high engine contamination. In other cases, the use of full-volume flushing oil is justified.

Is flushing oil worth it? In fact, this is the same oil with a mineral or synthetic base, but with an increased set of detergent additives and is able to support the engine only during flushing. It is able to dissolve harmful deposits and remove them from the motor.

Something else useful for you:

Video: Engine flush (diesel fuel) + oil change

When to Rinse

Buying a used car.
When purchasing a car whose service history is unknown to you (carbon deposits and sludge have accumulated in the engine), it makes sense to replace it with an engine flush. Use a stepwise method: first flush the engine with flushing oil, and then fill in a simple engine oil, but which must comply with your engine according to SAE and API classifications. Make the next replacement after 1-2 thousand km.
Switching to a different type of oil.
If you decide to switch, for example, from mineral water to synthetics, then it is recommended to flush the engine, since mixing different types of oils can cause sediment and deposits that subsequently clog the oil channels.
emergency situations.
The engine is flushed if you had to mix engine oils, use an oil of unknown origin, or there is a suspicion that a fake has come across.
Transfer to another class.
When switching to a higher class oil (according to SAE or API classification), it is also necessary to flush the engine.

Flushing is not required if you are the sole owner and change the same oil regularly and on time.

What to wash?

A small list of engine washes with a standard volume of 4 liters.

ZIC FLUSH. This washing liquid has good cleaning properties. Safe for sealing parts made of polymers (oil seals). It has the ability to retain the properties of fresh oil, preventing its oxidation.
ENEOS FLUSH. Excellent cleaning properties. Able to keep deposits in suspension, preventing clogging of oil passages.
Lukoil. Good quality/price ratio. It has a serious package of additives, excellent anti-wear properties, dissolves old dirt well.
"Lakiris". Product based on base oil with detergent and antioxidant additives. Gently dissolves sludge and soot, removes dirt well.
TNK Promo Express. Popular engine flush fluid. It is used by both garage craftsmen and service stations.