On the market, drivers can find many different product models. 75w90 oil is very popular. In this regard, car owners are very often interested in what it is, what characteristics it has, and from which brand is it better to buy? We will provide you with answers to these and many other questions.
What role does oil play in a gearbox
Before talking about the characteristics of any oil, it is necessary to find out what main tasks this fluid should perform. Its use is actually due to several reasons:
- Serves as a lubricant for the moving parts of the gearbox, while significantly reducing wear. Each 75w90 gear oil creates a protective film on the surface that prevents the appearance of microcracks, potholes and other defects on the surface of gears, as well as other parts of the box.
- Dissipates heat. During the operation of all parts, a strong heat generation occurs. High temperatures can lead to incorrect operation of the gearbox, respectively, and its imminent breakdown. Oil does not allow this.
- Effective corrosion protection. Almost all metals are vulnerable to the damaging effects of oxidizing agents. In order for the gearbox parts not to rust over time, it is necessary to use high-quality oil without water content.
- The operation of this unit is associated with a high level of noise, which creates discomfort while driving. Transmission oil can significantly reduce vibration and noise from the operation of the gearbox.
Thus, the composition of the oil must be fluid enough to guarantee full lubrication, as well as not freeze in cold weather.
SAE viscosity parameter
One of the main characteristics that you should definitely pay attention to when buying oil is its viscosity. For ease of purchase by the community of automotive engineers (Society of Automotive Engineers), a standard has been developed that divides all products into several groups depending on viscosity parameters.
Oils sold can be divided into summer, winter and all-weather oils. The first ones are marked with the usual number (from 80 to 250), and the second ones in the marking have the English letter W (from the word Winter - “winter”). 70W, 75W, 80W and 85W products are available on the market. However, it is becoming more and more difficult to find oils for a certain period, as all-season products have replaced them.
They have two numbers in their designation, separated by the letter W. Let's find out what 75w90 means. The first number 75W is the so-called winter flow index. The parameter indicates the lowest temperature at which the oil will perform its tasks. For this oil, the minimum operating temperature is -40 degrees Celsius.
The second number (90) is the summer viscosity index. In practice, it shows the maximum ambient temperature at 100 degrees Celsius for the oil itself. According to reference data, this parameter is limited to 35 degrees Celsius above zero. Now you know the temperature regime 75w90. Based on these parameters, we can conclude that the oil is ideal for use in temperate latitudes.
Performance characteristics
Deciphering gear oil 75w90 by viscosity may not be the only designation. Many products are also classified according to the API, which provides a comprehensive assessment of the transmission fluid based on performance. There are six groups in total. Only two of them are used in modern cars:
- GL-4 (or in the domestic classification TM-4). Similar products are designed for medium-loaded gears. As a rule, oil of this class is used in mechanical transmissions, as well as in mechanisms using spiral bevel gears. Oils can also be used in hypoid type gears, but only at low torque.
- GL-5 (TM-5). They are used in heavily loaded transmissions, in particular, in hypoid gears with low torque, but subject to short-term shock loading. The products are characterized by a high level of sulfur-containing EP additive.
Many car owners will be able to find 75w90 GL 4/5 gear oil. These transmissions can be used in a variety of load conditions, and for the most part are a universal option between GL-4 and GL-5.
What are the differences between oils labeled GL-4 and GL-5
As mentioned earlier, the first and most important difference is the scope. The GL-4 is designed to work in bevel and hypoid gearboxes. Contact stresses in such units do not exceed 3000 MPa, and the oil temperature is within 150 degrees Celsius.
GL-5 is used for the correct functioning of the hypoid gear in combination with shock loads. Such devices operate at stresses above 3000 MPa. The oil is used in units with a limited slip differential, providing high-quality protection of parts under conditions of high temperatures and loads.
An important distinguishing feature of GL-4 is the low concentration of sulfur-phosphorus additives in the composition. They create a very strong protective layer that is much harder than some soft alloys such as copper. The use of GL-5 oil in boxes where the use of a lower grade oil is required is unacceptable. This will lead to a large amount of metal chips and wear parts.
What to look for when choosing an oil
When buying, you should focus not only on the brand, the price of the product, but also familiarize yourself with several other important characteristics of the product. This may include:
- Viscosity. Gear oil must maintain its viscosity in a certain temperature range, properly performing its main functions. Here, when buying, be guided by the above-mentioned SAE classification.
- The difference between the pour point and flash point should be as large as possible. Be sure to take this into account.
- Critical load. The higher the number, the higher the quality of the product presented.
- Bully index (the higher the score, the better).
- welding load. According to the GOST regulations, the parameter must be below 3 thousand newtons;
- wear indicator. Relevant only for products of class GL-5. A quality oil should have no more than 0.4 millimeters.
These are the main characteristics of 75w90 oil, which you should pay utmost attention to.
Synthetics or semi-synthetics
Typically, drivers will find 75w90 synthetic gear oils on store shelves. At the same time, you can also meet semi-synthetics. The former have the best performance among all types of lubricants. The advantages of such products include:
- Optimum operating temperature range.
- Preservation of fluidity when exposed to sub-zero temperatures.
- hydrolytic stability.
- Low volatility and resistance to oxidation.
- Long service life.
- High viscosity index.
A noticeable disadvantage for many car owners is the high cost of synthetics, so an alternative is semi-synthetic oil, which is slightly inferior in terms of performance to the product described above, but has a more affordable price tag. In other words, the difference in the content of synthetics is about 20-40 percent, and the amount of additives can differ by 15 percent.
Gear oil rating 75w90
It should be noted right away that the best 75w90 gear oil is the one recommended by the manufacturer. You can find the necessary information in the technical manual for your car. Such products are developed specifically for your foreign car, so they meet all the requirements. But if money is tight, you can purchase another 75w90 GL-5 or GL-4 gear oil from a third-party manufacturer. The following TOP will help you with this.
Motul Gear 300 is one of the leading products in numerous tests. Gear oil has a high anti-seize index (60.1) and excellent welding performance. The oil film is highly stable, so it optimally minimizes the friction of the parts. The wear indicator is 0.75 mm. A small disadvantage is poor viscosity performance at sub-zero temperatures.
Castrol Syntrans Transaxle is very popular, which can be placed in second place. Low-temperature fluidity, a fairly high level of scuffing and a relatively low price make this gear oil in demand among many drivers. The fluid also boasts a high wear rate (59.4).
If for some reason Castrol products do not suit you, order a product from an equally popular brand. Mobil Mobilube is in third position. This brand of oil provides outstanding viscosity-temperature performance, optimal protection against thermal degradation and oxidation, and is also capable of operating at extended maintenance intervals. The oil is marked API GL4 / 5.
Another multipurpose oil according to API is Total Transmission SYN FE. The badass level is not far from the above products. It is 58.8, which is an excellent indicator. Unfortunately, drivers note low fluidity at sub-zero temperatures and poor wear protection.
LIQUI MOLY Hypoid-Getriebeoil has good characteristics. It is worth noting separately the indicator of fluidity. The oil retained its operational qualities even at a temperature of -40. The transmission extends the life of the components and perfectly protects the gearbox components from rust.
If the priority is to reduce the noise of the gearbox and provide maximum protection against scuffing, we recommend purchasing the ZIC G-F TOP. The oil can withstand extreme loads without problems, while it performs well in a wide temperature range. An alternative high-quality option is Transyn gear oil, the main feature of which can be called a high wear level of 0.94.
How not to buy a fake
A careful selection of oil according to its characteristics and numerous parameters will be useless if you buy a fake made in "artisanal" conditions. Such oil will not cope with its functions, and can also lead to accelerated wear and further breakdown of the gearbox.
When buying, be sure to check the date of manufacture, the quality of the printed label and the presence of various markings. The plastic canister and cap must have the manufacturer's branded design. Pre-check the Internet for what the desired oil looks like. These few tips will help you buy original certified products.
Technical fluids used in manual transmissions, transfer cases, drive axles are called transmission oils. The classification of gear oils has a similar structure to motor oils. But unlike them, the key parameters are: thermal-oxidative ability, lubricating function, anti-corrosion effect, as well as viscosity characteristics. In addition, transmission oil, by analogy with engine oil, is marked. The packaging contains SAE and API classification, as well as possible approvals from individual automakers.
Production technology SUPROTEK Atomium
The first digit and letter designation W (winter, winter) indicates to us the degree of fluidity at low temperatures. The lower the value, the more fluid the liquid will be in the cold. An indicator of 75 equates to -40 °C.
The second number is the viscosity range. It is also called summer characteristic. The indicator 90 corresponds to a positive temperature of 35 °C. It should be noted that the heating level of the mechanisms can reach 100 °C.
The temperature range of 75° is the most optimal option for the climatic conditions of Russia, so why was not a product created with even wider limits of action, for example, from -60 to +45.50 °C.
The answer lies in the lubricity characteristics of the gear oil. To maintain the balance of viscosity in different temperature regimes, special additive packages are used. In other words, too thin oil feels great at low temperatures, but it protects and lubricates gears worse, on the other hand, too viscous oil is a loss of transmission power, wasting energy on squeezing transmission fluid from under the teeth. It was possible to strike a balance in this dilemma only in this temperature range. There are other variations of transmission fluids. For example, for a hot southern climate and heavy loads at high speeds, gear oil with parameters 85w140 can be used.
Manual gearbox oil GL 4 - features
Gear oil API GL 4- Designed for medium loaded gears. The main area of use is mechanical gearboxes, mechanisms with spiral bevel gears. In addition, the operation of this type of oil can be carried out in transmission gears of the hypoid type. At the same time, a significant speed indicator must be compensated by a small or moderate torque.
The key point for the API GL-4 oil categories is that they contain half the sulfur-phosphorus additives compared to GL-5 technical fluids. The presence of these categories of additives allows you to create a unique protective coating. Working contact between the moving elements of the transmission is carried out directly through this protective film. Parts are preserved from wear. The operational resource increases.
It should be noted that a higher content of sulfur-phosphorus additives can adversely affect transmission parts consisting of copper alloys and other soft materials. Their wear in this case increases by 1.5-2 times. Buy gear oil GL-4 for your car is possible only if the manufacturer of the car has indicated free use in the operation certificate.
GL 5 transmission fluid - scope
Gear oil API GL 5- used in heavily loaded gears. Basically, technical fluids with such standards are used in hypoid gears, at low torque, but in combination with high speed. In addition, transmission elements may be subjected to short-term shock loads. The GL 5 standard is a high content of sulfur-phosphorus-containing extreme pressure additive.
Thus, Series 5 gear oil provides better extreme pressure properties as well as protection under high load and pressure conditions. But to the same extent, it is impossible to say 100% that the GL-5 standard completely overlaps the indicators of the GL-4 modification.
Here, first of all, it is necessary to take into account the material for the manufacture of transmission parts, technological features of work, the degree of current wear, and the intensity of current operation.
Comparison of GL 4 and GL 5 oils - is it possible to replace one with the other?
The purpose of GL-4 oils is the stable operation of bevel gears and hypoid gears. The maximum contact stress is 3000 MPa, while the temperature is up to 150°C. In general, we can say that these are front-wheel drive passenger car gearboxes. Having bought gear oil GL 5, you will ensure the effective operation of the hypoid gear in conjunction with shock loads. In this case, the stress can exceed 3000 MPa.
It is worth noting that the transition from GL-4 to GL-5 and vice versa is not allowed - these are different oils with different properties and purposes. As already indicated above, the key feature is the content of sulfur-phosphorus additives. In the GL-4 standard, there are half as many of them. Therefore, if GL-5 is poured into the gearbox instead of GL-4, then a rapid appearance of copper chips is observed, since synchronizers are mainly made of copper and its alloys, and sulfur-phosphorus additives instantly kill.
Comparison table for GL-4 and GL-5 transmission oil characteristics
| Criteria | API GL-4 | API GL-5 |
| Additives (sulfur-phosphorus) | ||
| Gearbox type | medium loaded, bevel transmission | Heavily loaded, Hypoid gear with shock loads |
| Max Voltage | Up to 3000 MPa | Over 3000 MP |
| Torque and speed | Moderate torque and significant speed | Low torque combined with high speed |
All motorists know that maintenance of their vehicle requires special consumables. This is engine and transmission oil. Unlike engine lubricant, the second type of consumable is poured into the gearbox. It contributes to the protection of moving gear elements from mechanical wear.
Engine oil needs to be topped up or changed much more frequently. In some new foreign cars, transmission oil is not provided for by the manufacturer at all during maintenance. But when repairing a gearbox, as well as in all old-style cars, there is a need to use the presented tool. What gear oil is better to fill in the gearbox, the advice of experienced auto mechanics will help you figure it out. There are several generally accepted recommendations.
General characteristics of the types of oil
In the cold period, the wrong oil will quickly thicken. In this case, the system will work "dry" for some time. The surfaces of moving parts will wear out, which will lead to the need for repair or a complete replacement of the mechanism.
Since gear oil is consumed slowly, all-weather consumables are very popular. They do not have to be changed every six months. Transmission maintenance costs will be lower.
The remaining varieties (summer or winter oil) are used under special climatic conditions, when constant ambient temperatures are maintained throughout the year.
Lubricity
Considering which gear oil is best for VAZ, BelAZ, foreign cars, and so on, a few words should be said about the lubricity of these products. There are 6 classes of presented consumables.
Each type of vehicle has its own specific type of substances. For ordinary passenger cars, products labeled GL-4 and 5 are suitable. If the car has front-wheel drive, GL-4 is suitable, and for rear-wheel drive models, GL-5.
There is no big difference between these two classes. GL-5 simply has a higher concentration of extreme pressure additives. Therefore, if the car is operated under increased loads, it is better to give preference to this class of lubricant. For normal driving conditions can be used for GL-4 transmission.
Autotest results
Experienced auto mechanics advise using gear oil recommended by the vehicle manufacturer. Modern foreign cars undergo a series of tests and trials. After lengthy research, technologists determine the best gearbox oil. Therefore, owning a foreign car, you should read the user manual. There is a clearly defined maintenance procedure for this model.
Many domestic drivers are interested in which transmission oil is best for Niva, VAZ-2110, VAZ-2114, etc. Experienced auto mechanics say that in this case GL-4 consumables with a viscosity class of 75w90, 80w85, 80w90 are quite suitable.
It is also important to consider the quality of this product. To avoid premature failure of the gearbox, you need to give preference to the means of trusted manufacturers. And to avoid buying a fake, it is better to contact licensed dealers.
Test results for synthetic oils
When studying the question of which gear oil is best for the VAZ-2114, Chevrolet Niva, Lada Lada, etc., the most popular synthetic products should be considered. If the mileage of the car is low, it is worth giving preference, according to auto mechanics, to such products as ZIC G-F TOP (700 rubles / l), Castrol Syntrans Transaxle (760 rubles / l), Total Trans SYN FE (800 rubles / l) .
Their fluidity and anti-friction qualities are pronounced. This allows the use of the presented funds in cold winters, high heat in summer. Extreme pressure additives allow the use of the presented consumables even under conditions of increased load. Experts single out these gear oils as the best of the synthetics.
User reviews of synthetic oils
When studying the question of which gear oil is best for the VAZ-2110, VAZ-2114, Lada and other domestic car brands, you should consider customer reviews. They argue that by using the above tools, you can significantly extend the life of the gearbox.
At the same time, the operation of this system becomes almost silent and easy. Engines run faster, vibration is reduced. The car starts easily even in winter. The only drawback is the high cost of such funds. But during operation, the price of oil is justified. It is better to purchase a reliable tool than to subsequently carry out costly transmission repairs.
Expert opinion on semi-synthetic oil
When studying the question of which transmission oil is best for the Chevrolet Niva, G8, Ten and other domestic cars with low mileage, you should take into account expert advice on semi-synthetic products. Their cost will be less than that of synthetic products, but not by much.
If a new domestic car has a low mileage, consumables of the type presented will be preferable. Experts call the best in this area LIQUI MOLY Hipoid Getriebeoil (750 rubles/l), ELF TRANSELF NFJ (600 rubles/l), THK TRANS GIPOID SUPER (900 rubles/l).
Each tool is designed for a specific type of gearbox. But there are also universal varieties. Auto mechanics highlight the high performance of the presented funds.
Lubricants in a vehicle are not only in power units. Friction parts are present in many car components, so the use of various kinds of oils is inevitable. Quite often you have to deal with motor and transmission lubricants. As for the latter option, questions often arise with it in terms of characteristics and viscosity, due to which the choice is difficult.
Popular lubricant
One of the most popular transmission fluids is 75W90 multigrade oil. It is used by most motorists because it has a high level of protection of parts, an increased temperature range, as well as unique flow properties. Replacing lubricants for manual transmission and drive axle occurs much less frequently than in the case of a motor, the more important it is to choose a good durable option.
What is "75W90"?
Introduction to gear oils should always begin with the definition of viscosity. Decoding SAE 75W90 is quite simple. The name has three parts, each of which allows you to learn about certain properties of the liquid. It begins with the abbreviation SAE, which in English means: "Society of Automotive Engineers." This organization for the first time introduced a classification of motor and viscosity classes, which is still used today.
Comes after SAE code 75W. It shows that when using this fluid in winter, there should be no problems with operation, with the exception of very severe frosts. It is impossible to pinpoint a minimum temperature threshold, as manufacturers often deviate from Community targets.
As a result, the average value of this parameter, at which both the drive axle and the gearbox work properly, and the mixture does not freeze, is about -40 degrees.
The last part is the number 90 at the end of the code. It makes it clear at what heat it is possible to use 75W90 gear oils without loss of viscosity, thickness and fluidity. There is a serious variation in this indicator for lubricants from various manufacturers, so there is no need to talk about exact numbers.
Nevertheless, on average, all of them are designed to work at temperatures not exceeding 35 degrees.
Thus, SAE 75W90 oils are designed to lubricate drive axles and gearboxes in weather conditions that range from -40 to 35 degrees. They can be used in areas with almost any climate (with the exception of areas with extremely high or low temperatures).
Oil features
The characteristics of the lubricating fluid depend not only on the viscosity class, but also on its composition. Regarding the latter, it is worth noting that the most popular and high-quality option is. It is able to provide the highest possible protection against wear of manual transmission and drive axle parts by creating an oil film on their surfaces, filling in irregularities and enveloping undamaged areas.
Another objective of this lubricant is to improve the quality of the gearbox. It concerns first of all smoothness.
Due to its viscosity, it is easily and evenly distributed over the parts, compensating for friction and replacing it with sliding. Due to this, the manual transmission works silently and efficiently.
In addition, this allows you to increase the heat exchange between the oil and the processed components: the latter, when overheated, give up part of their energy to a colder liquid.
As for semi-synthetic mixtures, they are not recommended to be used often. The fact is that mineral components can contribute to seizing the gearbox. Moreover, liquids of this type are less resistant to frost, while synthetics respond well to both the cold itself and sudden changes.
Oil tests
In the consumables market, you can find a large number of different oils.
Of course, you don’t want to randomly take and try this or that option, because in case of an error you will have to stay for a long time without a vehicle, moreover, having received serious financial costs.
Therefore, the best solution is to look at the results of independent testing by automotive experts. There are quite a few such studies, but in general they give approximately the same results: only the test samples change.
The main task, as a rule, is the study of viscosity at extremely low temperatures, because -40 degrees is only an approximate average value. Meanwhile, not only the operation of the transmission, but also fuel consumption depends on this indicator. There are oils of different price categories. As a rule, the cost is from 400 to 1300 rubles per liter.
The samples under study are placed in conditions of low temperature. The most accurate test of 75W90 gear oils will be carried out in natural frosts (Siberian and northern regions), it will provide accurate information about the behavior of the fluid in practice. As a rule, the thermometer drops to 45-50 degrees below zero, as this allows you to find out the minimum threshold for the lubricant to solidify.
A fairly large number of oil models from various manufacturers were tested. If we analyze a number of studies, then it can be argued that fluids from Castrol and Motul are among the best. They stably withstand drops up to fifty degrees of frost. They retain viscosity at a standard threshold up to -40 degrees of lubricants from Shell, Ravenol and Liqui Moly. The popular gear oil ZIC 75W90 begins to solidify a little earlier, so it is better not to use it in a sharply continental climate. The same applies to liquids from manufacturers Eneos and Mitasu.
Conclusion
Thus, gear oils are one of the most important fluids in a car engine. They allow you to reliably protect the parts of the drive axles and gearboxes, making gear shifting smooth and easy. Before purchasing a lubricant, you need to study various reviews and tests so as not to harm your vehicle.
Many motorists do not pay due attention to the maintenance installed on their cars. This is not surprising, because not every car owner has encountered problems in this mechanism. However, the box may well fail if not looked after properly.
For the full service of this device, it is necessary to choose the ideal gear oil. It will increase the life of the box several times and help you save money on replacing it.
However, before pouring a real product under the hood, you need to understand what properties affect its quality.
So, let's talk about what is for the checkpoint.
There are several indicators by which you can find out which gear oil is best and right for you. The first thing to pay attention to is the scope and standard.
Scope and standards
This characteristic is determined by the type. After all, the same substance is hardly suitable for both mechanical and automatic transmissions.
Liquids for manual transmission
Fully synthetic oils are best suited for manual transmissions. However, they are also semi-synthetic and mineral. There are several standards for such products.
- GL-1 standard. Such fluids are best used when operating a passenger car in simple conditions for it.
- GL-2 standard. It is not recommended to fill in passenger cars. But for use in agricultural trucks is ideal.
- GL-3 standard. Also intended for use in trucks. However, it should be operated in medium complexity conditions.
- GL-4 standard. One of the most famous and frequently used TM standards. Why? Because it is universal and can be used in any technique.
- GL-5 standard. Perhaps the second most popular. It has excellent features. This standard should also be divided by viscosity. There are thick fluids (SAE 85W-90), medium thick fluids (SAE 80W-90) and the thinnest synthetics and semi-synthetics (SAE 75W-90).
Oil classification:
Fluids for automatic transmission
Substances used to service automatic transmissions also have their own classification. It differs from the hierarchy of product standards.
So, TM for automatic transmission are of the following types:
- Dexron 3. The highest quality type of oil.
- Dexron 2. Middle class products.
- Dexron. Substances whose quality is lower than those of the previous ones.
However, whatever the gearbox, it is important that the correct fluid is poured into it. To do this, you need to know about the general characteristics of transmission fluids, which are directly responsible for their quality.
General characteristics
Most often, the level of critical load in different liquids is the same. However, just in case, let's clarify that the higher this figure, the better the product.
Badass Index
There are no rules for this index. However, here it should be noted that the higher this figure, the better gear oil you will get.
This is a well-defined standard. It is regulated by GOST rules and should not be lower than 3000 N.
Wear rate
The norms of this characteristic are determined only by type GL-5. According to the GOST rules, this criterion should not be less than 0.4 mm.
Viscosity
A very twofold criterion, the attitude towards which each motorist should develop individually. high, that is, the substance is thick, this contributes to an increase in the resource of the gearbox. However, if the viscosity of the substance is low, then this will reduce the energy cost of friction. Most experts say that the higher the viscosity index, the better the product.
Temperature characteristics
It's no secret that a good HM should perform its functions at any temperature. But every liquid has a pour point and a flash point. The best gear oil has the largest gap between these indicators.
So, it's time to figure out which gear oil is better to buy. In order to simplify the presentation of information, we have compiled for you the top 10 such liquids.
TM rating
- The Motul Gear 300 opens our rating. Its critical load reaches 1568 N. The rest of the popular transmission fluids have not come close to such indicators. This substance also has one of the highest scores (60.1) and has an average wear rate of 0.75 mm.
- Mobil Mobilube. This substance has one of the highest badass indexes - 60.2. At the same time, relative to its analogues, it does not have very large wear - 0.75 mm.
- Castrol Syntrax. We put it in third place due to the rather high badass index, which, nevertheless, does not exceed the performance of the previous instance. It reaches 59.4. But it is worth noting that the level of wear of such a product is high - 0.87 mm.
- total transmission. This is a product with a high level of scuffing - 58.8, but also with a rather large level of wear - 0.79 mm.
- Eurol Transyn. The scuff level is 58.5, which is not bad, and the wear level is 0.94, which is alarming. However, it is worth noting that the above types of oils contribute to the highest safety of the gearbox. They are popular among both experts and motorists. Next, we will talk about those products that are inferior to the favorites in this area, but have a number of other advantages.
- BP Energy. This TM is not intended for vehicles that are going to be used in extreme conditions. However, it will be able to keep the box of the car forever with the average complexity of its use. This fluid has the lowest wear rate among others - 0.41 mm.
- JB. This oil has a wear rate only slightly higher than the previous one. It is equal to 0.46 mm. But at the same time, he has a low level of badass. Total 47.9. This is not critical, but lower than other representatives of this competitive environment.
- Liqui Moly. This oil has average performance, in which it does not stand out from competitors. However, according to experts, it is perfect for thrifty motorists, as it has the highest efficiency.
- 9.SRS. The tribological parameters of this product also do not stand out among others. But car owners who use it claim that the real substance has a positive effect on the speed of warming up the car.
- NGN. This TM does not differ in terms of scuffing speed, or wear indicators, or viscosity indicators. However, it has one very nice property - its price. Among the oils with average performance, this will not “bare” your purse and will not disappoint you when working.
Conclusion
As we can see, there is a wide choice in the gear oil market. Each car owner can choose a product that meets the needs of his car and the size of his wallet.
Many motorists say that they do well without TM. Perhaps this is true. But remember that timely maintenance of the gearbox will cost about 15 times cheaper than replacing this mechanism. Therefore, it is better to play it safe and pour high-quality liquid into the box, because the miser always pays twice.
