Consumption rates for lubricants and special fluids. What oil consumption in the engine should be according to the norm Consumption rates for classic naturally aspirated engines

20.10.2019

The problem of engine oil consumption worries many motorists. As you know, lubricant consumption is one of the important indicators of the general condition of the engine. From some car owners you can hear that the engine does not take oil, that is, the level remains the same or remains within acceptable limits from replacement to replacement.

Others note increased or high oil consumption in the engine, which makes it necessary. We note right away that the manufacturers themselves separately indicate the norms for oil consumption in the engine. This means that the power unit can consume lubricant within certain limits, and such consumption is not a malfunction.

This phenomenon is commonly referred to as oil consumption for waste. However, exceeding the norm for adding oil to the engine may well indicate problems with the internal combustion engine, motor, etc.

In this article, we will consider what kind of "oil appetite" of various power units can be considered acceptable, as well as what factors and features affect the consumption of lubricant in the internal combustion engine.

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So, let's start with the fact that all engines consume engine oil to a greater or lesser extent. This happens taking into account the design features of the internal combustion engine, namely because of the urgent need to lubricate components and parts. In other words, the main loss of lubricant occurs as a result of the need to supply lubricant to the cylinder walls.

This area in the engine is a heat-loaded area. For this reason, partial evaporation and combustion of the lubricant occurs. Also, part of the oil is not removed from the cylinder walls, as a result of which the remaining lubricant burns along with the fuel in the combustion chamber.

As a rule, in modern engines, the declared oil consumption is, on average, from 0.1 to 0.3% of the total fuel consumption that was spent to overcome any segment of the path. It turns out that if the car has traveled 100 km, and the consumption is 10 liters of fuel, then the consumption of an average of 20 grams of oil will also be the norm.

It turns out that the lubricant consumption can be considered acceptable if it does not exceed the mark of about 3 liters. per 10 thousand kilometers traveled. It is also important to understand that the consumption rate will greatly depend on the type of engine, its degree, etc.

For example, for many gasoline ICEs, the norm is about 0.1%. On gasoline turbo engines, the consumption rate is noticeably higher. As for the declared lubricant consumption, the norm will be more than any gasoline analogue and averages from 0.8 to 3%. The indicated 3% are consumed by forced turbodiesels with two turbines, etc.

You can also separately mention rotary motors, which are particularly prone to lubricating fluid consumption. Such units (taking into account their fully operational condition) consume about 1-1.2 liters of oil per 1000 km. run. For reference, the manuals for different engines indicate that the rate of oil consumption for waste is 1 liter per 3 thousand kilometers traveled, that is, about 3 liters per 10 thousand km.

At the same time, manufacturers also note that the consumption directly depends both on the technical condition of the internal combustion engine and on the characteristics of the operation of a particular vehicle (load on the unit, speed, etc.)

What determines the oil consumption in the engine and how to reduce it

As mentioned above, oil is consumed in any engine, since the oil film on the parts to protect against dry friction burns in the chamber along with the fuel charge. If we add to this the natural wear of the internal combustion engine during operation, then the consumption of lubricant increases further.

However, it becomes quite obvious that 3 liters of oil per 10 thousand km. for a small car with an in-line aspirated engine, it can be considered a large expense, while for a powerful unit with a large displacement, this is a completely acceptable indicator. Practice shows that even if the engine began to “eat” oil above the norm, it is more economically profitable to simply add lubricant than to immediately overhaul the engine only because of increased consumption.

The fact is that at many service stations, masters prefer not to diagnose a separate cause of increased oil consumption, but immediately offer the owner to make a major overhaul. It is important to bear in mind that such expensive repairs are not always necessary.

First of all, lubricant consumption can be increased due to the fact that oil flows out of the motor. In this case, it is enough to replace the gaskets and seals. As a rule, you need to pay attention to, camshaft oil seals, etc.

In various situations, grease can flow on the outer surface (leak out) and also penetrate into other systems. For example, if the crankshaft oil seal is to blame, and a puddle may form under the car.

If the oil is actively consumed in the engine for waste,. In this case, especially compared to a leak, it is much more difficult to establish the cause without disassembling the engine.

However, even in such a situation, you can try to fight the waste before agreeing to a repair. First of all, the lubricant consumption depends on the mode of operation of the motor. In other words, driving at high speeds leads to an increase in temperature and loads, the oil liquefies, it is worse for rings to be removed from the cylinder walls, it burns out, etc.

It is also important to understand that the lubricant may not be suitable for the engine in certain parameters. This means that you need to know which oil to choose for the engine and what features to consider.

If the motor is worn out, then in parallel it is necessary to take into account the features of the selection of oil for engines with high mileage. In a nutshell, the reduced viscosity material forms a thin film that the oil rings cannot remove from the walls. If the lubricant is thick, then the film is very thick, while the rings cannot remove such a layer in full.

With this in mind, it becomes clear that you need to use the most suitable oil both in terms of tolerances and in terms of high temperature viscosity index. For example, from the list of recommended lubricants in the manual, you need to select a product with a higher viscosity compared to what is currently filled.

Each of the solutions has both its pros and cons, however, for a worn engine, in many cases it is possible to reduce lubricant consumption and.

Increasing the pressure in the crankcase also causes excessive consumption of lubricant. In simple terms, high crankcase pressure causes oil to end up where it shouldn't be.

As a result, the lubricant enters the cylinders through the intake, after which it burns out in the engine along with the fuel. In such a situation, it is necessary to diagnose and clean the crankcase ventilation system.

Problems with also lead to lubrication leaks in the supercharger area, oil also enters the cylinders through the intake, etc.
The solution requires diagnostics and repair of the turbine. In extreme cases, you can replace the turbocharger, while the lubricant consumption will also decrease.

What is the result

In view of the foregoing, we can conclude that the main reason for an engine overhaul is the presence of significant defects and damage, as well as high wear of parts and wear on the cylinder walls (seizures, changes in geometry, etc.).

In this case, eliminating the “zhor” of the oil only by decoking, replacing rings, valve stem seals, or switching to a more viscous lubricant will no longer work. Typically, engines with such damage have low compression, start poorly both cold and hot, and lose power significantly.

During operation of the unit, knocks and extraneous noises may be present. As a rule, after disassembly and troubleshooting, the block must be bored/sleeved, the crankshaft must be ground, etc. In other words, a major overhaul is needed.

If the engine is worn out, but it works normally, while the oil consumption is above the norm, then you should not expect an instant increase in lubricant consumption. Lubricant will be consumed more and more, but this problem will progress slowly.

It turns out by adding several liters of lubricant for every 10 thousand km. will allow such a motor to be operated for more than one tens of thousands of kilometers without major repairs (if no other breakdowns occur). At the same time, it is more profitable to top up the lubricant than to repair the motor.

In addition, the use of a more viscous oil, replacement of valve seals and cleaning of the crankcase ventilation system will help reduce overall lubricant consumption and the cost of maintaining and servicing the internal combustion engine.

How is engine oil consumption calculated?

To determine the norm, it is not the mileage that is taken into account, but the consumption of the fuel resource. This indicator is more accurate than the distance traveled, because when you are in traffic jams, the oil is depleted even more, and the odometer does not change its value.

It is customary to calculate the oil consumption in the engine according to its volume of 100 liters of fuel spent on combustion.

To find out the rate of oil consumption in the engine of your car, you need to use the calculation formula and calculator, or use this online form. It involves calculating the allowable amount of oil for waste according to the type of engine, the volume of operating oil and the amount of fuel consumed, taking into account the state of the piston group.

Calculation formulas for oil consumption

General actual oil consumption for waste per cycle of its operation(from replacement to replacement) can be calculated by the formula:

Qy = ∑q + (Qz-Qsl),

Where ∑q is the oil topped up during the cycle (between maintenance); Qz - filled during refueling; Qsl - merged during replacement.

And here oil consumption in liters per 100 liters of fuel define it like this:

Mz \u003d V / (P * k),

Where V is the capacity of the engine lubrication system; P - fuel consumed k - coefficient taking into account the wear of the piston group (k - for a diesel car 1.25; gasoline 1.15; turbo 1.3).

Oil consumption rates are increased up to 20% for vehicles after overhaul and in operation for more than 5 years.

Consumption rate of engine oil for waste

For passenger car transport, the normal indicator of waste is the consumption of 0.005 - 0.025% per 100 liters of fuel, which is approximately 5 to 25 grams of oil per 1 thousand km. In a worn engine, up to 0.1% and 100 gr. per 1000 km respectively. Well, if the car works at the limit or has a turbocharged or diesel unit, then this rate will be even higher.

For trucks long-length oil consumption rate is 0.3 - 0.4% of fuel consumption. The calculation formula uses the amount of burned fuel and topped up oil for this period. But such a calculation of oil consumption, assumed by the automaker Scania, is relevant only for heavy cars with a large engine. Calculations of lubricating fluid consumption in passenger cars, both with diesel and gasoline engines, have a slightly different look.

Consumption rate of engine oil per 100 liters. fuel for passenger cars

For VAZ carburetor cars, the norm is considered to be from 0.3 to 0.4 liters. per 100 liters of fuel.

A gasoline engine operating at the limit of its capabilities can consume from 0.4 to 0.6%, at 100 hp. fuel used, which is approximately 400 - 600 grams of engine oil per 1000 kilometers. With diesel, the situation is exactly the same - engine lubricant consumption increases by 0.5%. But if these are forced turbodiesels with two turbines, then the consumption can reach up to 3% of the volume of oil poured into the engine.

Keep in mind that oil consumption rates significantly increase for vehicles after overhaul and in operation over five years.

The average indicator of engine oil consumed by the engine after a run of 150 thousand km is 0.35 - 0.55 liters.

Method for determining oil consumption

Oil level on the dipstick

The determination of the actual value of the specific consumption of engine oil for waste is carried out with a mileage of 200-300 km. The car during the control run must be technically sound. The oil level in the crankcase should be between the "MAX" and "MIN" marks on the engine dipstick. Before the control run, it is necessary to warm up the engine, the oil temperature should be 80-85°C. Drain the oil on level ground. It should drain from the pan within 15 minutes. For the accuracy of the result, it is desirable to determine not the volume, but the weight, since the amount of lubricant remaining in the filter can only be found by weighing it.

How to use the calculator

One of the main roles in this calculation is played by the volume of fuel burned and the volume of operating oil, as well as the type of engine. It is with respect to this volume and the specifics of work that the specific oil consumption is calculated.

To calculate the specific oil consumption in the engine, the following data are required:

In the "fuel" field - enter the average fuel consumption in liters per 1`000 km. mileage (by default and based on the calculation formulas, this is 100 liters);
In the field "oil" - the volume of oil that is regulated by the manufacturer as necessary when filling;
Select engine type and check if the machine has been in operation for more than 5 years
Click "calculate".

Please note that the results of the allowable engine oil consumption calculator are a general case and for some engines (assumed by the specifics of the design) may be inaccurate and need to be adjusted.

Such a calculation calculator can be an indispensable assistant for calculating the consumption rate of lubricants intended for prompt accounting of the specific consumption of engine oil when justifying the need for them. After all, if not all, then many motorists are quite alarming about the oil consumption in the engine. This service will show whether you fit into the nominal values. If not, then you will have an objective reason to look for causes and possible problems.

What's the bottom line

That is, if the engine is in order, then it practically does not take oil, and you will not need to top up until the next replacement. Its level will be within the allowable limits on the dipstick (within the min. / max. marks). But there are cases when the manufacturer indicates the consumption rates for a particular power unit (some), then topping it up is considered natural and not a malfunction, but on average it does not exceed 1-2 glasses from replacement to replacement.

It is important to understand that the harder the engine runs, the more oil burns in it. So, for example, the higher the number of revolutions, the more oil will remain in the cylinders of a car engine. Although you should not forget not only about the mode of operation of the engine, but also its design. And you should not neglect the tolerances of engine oils and fill in fuels and lubricants of dubious quality.

In the section on the question Where to find the norms and what is the frequency for replacing antifreeze? given by the author Yaisiya Lukanina the best answer is To minimize the risk of engine overheating, you need to carefully monitor the health of all elements of the cooling system, carry out preventive maintenance and technical inspection, maintain the required level of coolant and eliminate leaks in a timely manner. Antifreeze should be replaced every two years or every 50 thousand kilometers. When replacing antifreeze, it is advisable to clean the cooling system of rust, scale and other contaminants using special flushing agents.

Answer from Jurela[guru]
The main thing... that not the left was!! !
Before the winter period .. check ... Well, everything, then, in principle, it depends on the mechanic or the drivers! !
Why are they ... straight ... like columns !!!

Answer from Yuriy[newbie]
Try to read the instruction manual or service book, everything seems to be written there.

Answer from ETERNAL STUDENT 2007[master]
for passenger cars there are recommendations from manufacturers - replacement every 3 years. I think for trucks, too, no more, because on average, over 3 years, antifreeze loses most of its useful properties. .
on the page
find
Application
to the order of the Ministry of Transport of Russia
dated 14.03.2008 N AM-23-r
GUIDELINES
FUEL AND LUBRICANT CONSUMPTION RATES
BY ROAD TRANSPORT

Answer from AVL[guru]
The norm of life is once every 3 years.

Answer from Alexey Baranov[guru]
Some antifreezes can withstand 5 years of operation and 100-250 thousand kilometers. The shelf life and frequency of fluid replacement are usually indicated on the packaging. And yet, during operation, coolants gradually lose their properties: due to the operation of additives and a decrease in the alkalinity reserve, aggressiveness to rubber and metals increases, and foaming increases.

They know that motor oil is a consumable. But many of them perceive this as the need for periodic replacement at scheduled times, forgetting that there is also a natural consumption as a result of burning a certain amount of it while the power unit is running. In the normal state, this expense is small, so many car owners simply do not notice it. But even if the lubricant level has noticeably decreased, which is determined by the marks on the dipstick, this does not always indicate the presence of any malfunctions. It is enough just to add the required amount and continue to operate the car. But if a decrease in the level occurs frequently, it is worth considering using computer diagnostics to find out the cause of this phenomenon and eliminate it. Of course, many factors influence the level of engine oil consumption - the type of engine, its volume, the age of the car or its actual mileage, and even the driving style of the car owner. Therefore, it is so important to know the exact consumption rates and be able to determine why these rates increase over time.

Boundary oil consumption rates for different engines.

Normal consumption MM

It is impossible to give an exact answer to the question of what oil consumption in the engine should be considered normal, since this indicator can vary greatly depending on a variety of factors. We only note that the combustion of oil in the CPG is a natural process, which, unfortunately, cannot be avoided. Since the lubricant is supplied to the walls of cylinders operating in extreme temperature conditions, its evaporation and partial combustion is inevitable. A certain amount of MM remains on the cylinder walls due to the not absolutely tight fit of the piston rings, so this lubricant enters the combustion chamber, igniting along with the air-fuel mixture. If we give very general and approximate figures, then in modern power units the consumption declared by the manufacturer is 0.1-0.3% of the total fuel consumption used to overcome a certain distance. For example, let's take a car that consumes 10 l / 100 km. fuel. Every 100 kilometers it will lose about 10-30 grams of oil.

If, with a run of 10 thousand km, the consumption exceeds 3 liters, this is already a reason to wonder why your car has become so voracious. However, in many cases this is a completely natural process - the result of wear of rubbing parts and an increase in gaps with a decrease in their ability to hold the thinnest oil film. Note that during the break-in of the vehicle (or when installing a new power unit, as well as after replacing the piston group), oil consumption increases to an average of one liter per thousand km. Depending on operating conditions, oil consumption rates per 1000 km. with a car mileage in the range of 10-150 thousand km will be as follows:

with a moderate driving mode - 0.25 l .;
when driving with an increased load - 0.4 l .;
if the car is operated in mountainous areas - 0.5 l .;
if the power unit has a mileage exceeding 150 thousand km. - 0.3-0.55 l.

And yet it is generally accepted to bring the standard indicators depending on the type of motor.

Consumption rates for classical atmospheric engines

At present, the share of gasoline atmospheric power units among the entire mass of internal combustion engines remains predominant. For engines with a relatively short service life, the generally accepted consumption rate is about 0.005-0.025% for every 100 liters. In other words, if the fuel consumption indicator is within the normal range, your car will “eat” 5.0-25.0 grams per thousand kilometers. For worn engines, this figure rises to 0.025-0.1%, or burning 25-100 grams of MM every 1000 kilometers. If you operate the car in difficult or extreme conditions, be mentally prepared for the fact that after hitting every thousand kilometers you will have to add from 400 to 650 grams of lubricant.

Consumption rates for turbocharged units

Forced gasoline power units differ from increased fuel consumption, therefore, even for new cars, the rate of engine oil consumption will be about 80 grams for every 100 liters of fuel burned. The modern market offers an increasing number of cars equipped with just such power units, while the number of turbines can vary from one to three. Possessing much more power with comparable or even smaller sizes, such engines are considered the most demanding in terms of both fuel consumption and lubricant consumption. This is understandable, since the turbines themselves need lubrication and are an important source of lubrication. And if there are several turbines, then the oil costs will be even greater. The permissible oil consumption on a boosted engine strongly depends on both the driving style and the engine resource, so it is difficult to give specific indicators here.

MM consumption on diesel engines

The consumption rate of oil for waste on a new diesel power unit is comparable to the consumption for turbocharged gasoline engines and is about 0.3-0.55 grams for every 100 liters of fuel. A critical mark, indicating that you should contact a specialist, is an excess of engine oil consumption in the engine of an indicator of two or more liters for every thousand kilometers.

Reasons for the increase in MM consumption

A noticeable increase in engine oil consumption, as already noted, is a natural phenomenon, but there may be several reasons for the occurrence of such a situation. Let's try to figure out what specifically has the greatest impact on the degree of increase in lubricant consumption and whether it is possible (and how justified) to deal with it. In most cases, oil is consumed more than the norm due to overheating of rubbing parts (evaporation) or as a result of an increase in technological gaps (leakage). Some problems simply indicate wear that is not critical to the engine, and its elimination requires an expensive overhaul. Other reasons may indicate the presence of very serious problems, without urgent elimination of which the engine may soon fail.

Perhaps the most common cause of MM leakage is a violation of the integrity of the BC gasket. This situation usually occurs either as a result of improper tightening of the bolts, or due to overheating of the motor. The way to diagnose the problem is quite simple - a visual inspection of the power unit. The presence of gasket damage will be indicated by oil leaks present in the gasket area. According to statistics, aluminum motors are especially often guilty of this malfunction. If traces of MM are found on the engine, the problem should be fixed. It is possible that for this it is enough to tighten the insufficiently clamped bolts, but more often the reason lies in the curvature of the surface of the BC head. In this case, it must be leveled, and the gasket must be replaced.

Crankshaft

The second common cause of an increase in engine oil consumption is the leakage of lubricating fluid through the seals. This will be indicated by MM smudges under the power unit. The cause of the leak is the wear of the edges of the sealing elements. This result can lead to:

the use of low-quality seals;
the use of oils not recommended by the automaker;
long-term operation of the lubricant (exceeding the scheduled replacement periods).

The second reason is most common, especially for older car models. The problem is relatively easy to fix by replacing leaking seals.

Oil filter

A poorly screwed oil filter is an infrequent cause of lubricating fluid leakage, most often manifested when inexperienced car owners replace this consumable on their own. Usually, to ensure the required tightness, the o-ring is lubricated with a small amount of MM. Beginners do not take this nuance into account, and when wrapping the oil filter, they use insufficient force, which leads to a leak. If the problem cannot be fixed, it is better to change the oil filter to a new one.

valve

The leakage of oil seals operating in high-temperature conditions is also considered a natural phenomenon, since over time rubber loses its elastic characteristics, and the caps are no longer able to provide complete tightness. In such cases, lubricant leakage can occur both at the outlet and at the intake stage. A layer is formed inside the valves, consisting of deposits of oil and fuel assemblies, significantly worsening the engine's injectivity. To solve the problem, replace the caps related to consumables.

Oil scraper rings are a common cause of increased oil consumption, which, getting into the cylinder, mixes with the air-fuel mixture and burns out. Detecting this problem is quite simple - the color of the exhaust acquires a pronounced bluish tint. Rings are made from a material with a specific elasticity index. If the engine often overheats, that is, it operates in high power modes, elasticity decreases. A temperature of the order of 185-200 ° C is considered critical, however, this indicator is individual and depends on the quality of the oil scraper rings. Easily diagnosed loss of elasticity is a sign of the need to replace the rings, which sometimes lose their consumer properties prematurely due to the occurrence of flutters - an effect in which the rings spontaneously enter into resonant vibrations.

Ring coking is another factor that increases lubricant consumption. Their sticking to the piston causes the ring to lose its sealing function, as a result of which the engine compression drops noticeably, accompanied by an increased consumption of MM. Typically, coking occurs either as a result of using the wrong oil or due to normal wear and tear. Special compounds are used to clean the rings, and if they do not help, they will have to be replaced with new ones. In older engines, the destruction of piston bridges can also lead to an increase in MM consumption. These are age-related changes that require the replacement of the piston itself.

cylinders

The oil consumption rate also depends on the condition of the cylinder walls. Due to the increased wear of the O-rings, excess lubricant penetrates into the CPN, which leads to an increase in MM burnout. Wear can be caused both by the aging of parts of the power unit, and the appearance of various defects in the form of scratches on the surface of the cylinders. Gradually, lubricating fluid accumulates in them, leading to the formation of seals that impede the movement of the pistons. In the end, due to overheating (for example, due to clogging of the water channels of the cooling system), the cylinder may simply warp. In such cases, instead of being round, its diameter takes the form of an oval, due to which the sealing rings are no longer able to provide the required tightness, preventing leakage of technical fluids, including engine oil.

One way to solve the problem is to use rings with less stiffness. However, soft O-rings with spring expanders are highly sensitive to extreme temperatures, which is undesirable for a car's cooling system. In any case, it is possible to compensate for the change in the shape of the cylinders only by boring, which is quite expensive, or by using rings with a modified geometry that is maximally adapted to the changed shape of the cylinders. Late ignition is also one of the reasons for the increase in lubricant consumption, but it is easily eliminated - just contact any service station. If you have the appropriate experience, you can adjust the ignition system yourself, since this is a fairly simple procedure.

Increasing the power of a car's power unit with a turbine is becoming an increasingly popular option, but you should always remember that this is a double-edged sword. A turbocharger is a part that requires intensive lubrication, without which it will quickly fail. This means that boosted engines "eat" oil with a much greater appetite than their naturally aspirated cousins. These kinds of problems cannot be avoided. At the same time, some turbocharged engines consume up to 200 grams of engine oil for every hundred kilometers, which is certainly a lot. Topping up two liters every thousand kilometers is not a cheap pleasure, but, as they say, one cannot do without sacrifices. In other matters, most forced power units are characterized by a lubricant consumption that is an order of magnitude less than the specified value, that is, everything is individual here.

Often, even experienced motorists use high-viscosity oil, which, on the one hand, improves the lubrication of the CPG, contributing to the formation of a thicker oil film. This helps to increase the resource of many engine components. But, on the other hand, such a step causes an increase in MM losses. The explanation for this is simple - the larger the area of contact of the liquid with the rubbing surfaces, the greater the rate of grease burnout. That is, choosing an oil with an improved viscosity index, you must solve an important dilemma - spend more money on topping up oil or refuse to increase the total resource of the power unit. The choice will be especially difficult for owners of used cars, who already eat a lot of technical fluids with a resource that is already “breathing its last”.

Another thing is the use of low-quality oil. They buy it in the hope of saving money, because the products of noname manufacturers are several times cheaper. Although the viscosity of such a lubricant usually corresponds to the specified rating, many of its important characteristics are determined by the addition of additives to the composition. For branded oils, these are the most modern high-tech additives that help reduce losses due to oil evaporation. Cheap analogues do not have such additives, which automatically leads to an increase in the consumption of lubricating fluid. Therefore, such savings are hardly justified, at least from the point of view of the cost of topping up the MM, not to mention the harm that is caused to the nodes of the power unit.

terms of Use

It should be mentioned that the prevailing operating mode can also have a significant impact on the consumption rates of technical fluids. If the engine is often under heavy load, increased engine oil consumption is inevitable. If you are a supporter of an aggressive driving style and prefer a sharp start and movement at maximum speed, if you live in mountainous areas, be prepared for the fact that you will have to add lubricant much more often. On the contrary, driving at an average pace reduces the consumption of both fuel and oil, since in this case the temperature regime is more gentle, and losses from waste are minimal. So, if you have a long trip on the highway, be sure to take a can of oil with you to top up, even if you have not noticed an increase in consumption before.

Summing up, we can conditionally divide the causes of increased lubricant waste into two categories: those that are inevitable due to natural wear and tear, and those that arise due to the use of inappropriate consumables and materials. In the latter case, it makes sense to compare the cost of purchasing cheaper oil with the cost of refilling it frequently. If the expense is associated with the natural wear of CPG parts, it is better to spend money on topping up a few extra liters of lubricating fluid every 10 thousand kilometers than to overhaul the engine.

Question from a reader:

« Hello. Please tell me what is the normal oil consumption for a non-new engine. Foreign car mileage of about 180,000 kilometers. Every thousand I add almost 300 grams! I don't think this is normal? Thanks in advance for your reply»

To be honest, I have already talked a little about oil consumption. BUT today I want to talk about the normal value. An internal combustion engine, no matter how perfect it is, still consumes a little oil - so what is the normal value ...... ..

Conditionally, I want to separate the engines: - these are ordinary gasoline, turbocharged gasoline and diesel engines, as a rule, they are also turbocharged.

One golden rule – normal fuel consumption is calculated not by vehicle mileage, but by fuel consumption. That is, for 100 or 1000 liters consumed. Usually a value equal to 100 liters is taken.

Conventional gasoline engine

For new gasoline engines, normal oil consumption is considered to be 0.005 - 0.025% per 100 liters. That is, with an average mileage of 1000 kilometers, normal oil consumption will be 5 - 25 grams.

For normally worn engines - normal oil consumption is 0.025 - 0.1%, that is, 25 - 100 grams of engine oil will need to be poured per 1000 km.

For worn engines on the verge of repair - oil consumption is 0.4 - 0.6% per 100 liters of fuel. This is 400 - 600 grams per 100 liters. The critical mark of 0.8% is 800 grams of oil per 100 liters.

In turbocharged engines, normal oil consumption is slightly higher than in conventional aspirated engines.

For a new engine, normal consumption may well be 80 grams per 100 liters. That is, for 1000 kilometers we add 80 grams, 10,000 km - already about 800 grams

For worn-out turbocharged engines - here the guys can reach up to two liters. And if the turbine is faulty, then the flow rate can be even higher. Therefore, if your car consumes more than two liters, then you need to diagnose and repair if necessary.

The consumption of a diesel engine is almost the same as a turbocharged engine. Normal oil consumption is about 300 - 500 grams of oil per 10,000 kilometers. If the consumption exceeds 2 liters, then you need to go to the service.

That's all. Your 300 grams per 1000 kilometers is definitely a lot, go to a car service for now.