Few people know what gl 5 oil is. For the lubrication of any units that require increased wear resistance, there are transmission oil, whose main tasks are excellent protection against wear, damage and corrosion. When lubricating mechanisms containing gears, important role plays the ability of the lubricant to resist bullying of the gear teeth and the connection of microroughness due to temperature differences.

Automotive oil gl 5 perfectly protects parts from wear.

What is gear oil

There are many mechanisms and units in which gears of different diameters serve as working tools, making up gears conical, worm, cylindrical and chain characters. These include mechanisms with steering, gearboxes, transfer and differential devices. All of them are called transmissions, and their stable work depends on good lubrication.

Gear oils have a high viscosity.

Since all these units have similar operating conditions (there are practically no strong temperature and mode changes in their operation), transmission oils have a high viscosity. The temperature at which it solidifies is quite low. Since there are a lot of rubber sealing products in these mechanisms, the lubricant should have the ability to reduce the gaps during the operation of transmissions and prevent deformation of these gaskets. It is important to know that even when this mechanism is not used for a long time or does not work in full force, the properties of the oil are preserved, the gears remain lubricated and well protected.

Gear oil prevents water or any other liquid from entering the unit, thereby preventing the formation of harmful impurities and build-up on gears and other parts of transmissions. It creates protective film not only on the surface of the teeth, but also on all parts, thereby protecting against corrosion and other mechanical and chemical damage. It must be remembered that hypoid gears cannot be lubricated with this oil. For them there are special hypoid oils containing various chemical components that cause the desired chemical reactions.

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How to choose oil

Gear oils are not used in all mechanisms that have gears. They can only be used in conventional vehicles with all-wheel drive and front-wheel drive mechanisms. Under no circumstances should such a lubricant be used in vehicles with automatic transmission, as in this case this oil will not work due to its high viscosity.

For them there is special grease, which can be purchased at car dealerships.

The brand of oil depends on the manner and style of driving.

Everyone is free to choose which oil is better to use. There are synthetic, semi-synthetic or mineral oils. Since the temperature regime is unimportant for transmission units, this property does not play a special role when choosing a lubricant. The only criterion by which you need to choose oil in this case is an economic benefit. From this point of view, it is advantageous to purchase mineral grease, it is cheaper than synthetics by about 30%. Several criteria are of great importance when choosing lubricants.

1. The force of loads experienced by parts of the transmission during operation. In this case, the grease must be sufficiently viscous to allow full circulation, the anti-corrosion properties must be at highest level. The anti-seize properties must prevail over any other properties, otherwise seizing the gears will inevitably lead to their failure. And this will disable the entire unit.
2. Loads that contain precisely rotational movements that depend on the relative slip speed. In this case, the lubricant must have excellent protective functions that allow you to keep all gears and spurs in good condition. Wherein rubber seals must be lubricated on all sides so that no gaps form during operation.

In order for the above properties of gear oils to work in the proper mode, various additives are added to them, which are carefully developed and selected depending on the mode in which the mechanism is going to operate. Particularly interesting in this regard are extreme pressure additives, which are chemical compounds. These compounds can be both beneficial and harmful. After all, chemicals, especially under the influence of different temperature conditions, can corrode metal surfaces. This can lead to wear on gears and chains. The protective film created does not prevent corrosion, but can stop this process.

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Oils gl 4 and gl 5

The industry offers gear oils of two groups. These are gl 4 and gl 5. This is how European and American manufacturers. According to the American quality system (API), there are groups of lubricants that differ in their properties and characteristics. Both types of oil are used only in vehicles with a manual transmission.

Oil suitable for passenger car Russian production.

1. Gear oil API gl 4 is recommended for use in operational easy and medium severity. It can be used in all Russian-made passenger cars (except for the Niva), as well as in various trucks, minivans and buses where front-wheel drive gears are installed. They can also be used for drive axle units. And also for those gears where a small displacement of the axles occurs during operation. Such oils are in the lines of all leading manufacturers. automotive oils, including Russian ones. This lubricant is synthetic or semi-synthetic, that is, produced in laboratories from refined petroleum products, with the addition of 4% of unique additives that make up the whole package. Each of the additives improves some one property of the oil.
2. Gear oil API gl 5 is recommended for use in severe and extreme operating conditions. It is used for all-wheel drive boxes (with hypoid gears ah), because it contains special additives specifically for working with them. Recommended Russian manufacturers for Niva cars, since this car contains mechanisms with a significant and large displacement of the gear axes. Since this oil contains up to 10% additives to improve each lubrication property, it is the best transmission fluid available today. This type of lubricant contains a unique additive package that is developed in the USA or Europe.

Many consumers are wondering: what is the difference between gear oils of API GL-4 and API GL-5 standards? In addition, manufacturers often lubricants indicate on their products compliance with both standards at the same time - API GL-4 / 5.

API GL-4 is specified for gear oils used in bevel and hypoid gears in gearboxes and drive axle assemblies operating under moderate speed and load conditions. API GL-5 standard - for high speed hypoid gears and drive axles operating at high temperatures and subjected to short-term shock loading.

Thus, in accordance with the classification, API GL-5 oils provide the best extreme pressure properties, protection under high loads and pressures. It is absolutely correct to say that API GL-5 oils cover the requirements API standard GL-4. The problem is that the classification of gear oils does not take into account technological features a number of gearboxes.

If we trace the history of the development of gear oils, we can note that several decades ago, lubricant manufacturers used lead additives for wear protection. Subsequently, they were replaced by sulfur-phosphorus additive packages due to the fact that lead has a negative effect on environment. Sulfur was then observed to corrode parts made of copper and other soft metals. However, about 20 years ago, additive packages were developed to neutralize corrosion from sulfur-phosphorus additives.

The key point is the fact that on average in oils API categories GL-4 sulfur-phosphorus additives are half as much as in API GL-5 oils. Sulfur-phosphorus additives create a special protective covering on transmission parts. During operation, the contact between the rubbing elements occurs through this coating and thus the parts are protected from wear. However, when copper parts come into contact, this coating appears to be stronger than the surface of copper parts or other soft parts. As a result, not only the protective layer is worn, but also the surface of the soft metal element.

A number of studies have shown that when using API GL-5 oils in boxes where application is required API oils GL-4 causes 2-4 times more copper in used oil than API GL-4 oils. As a rule, synchronizers are made of copper and are subject to increased wear, when using lubricants with high content sulfur-phosphorus additives. Some lubricant manufacturers, when specifying the API GL-4 / 5 standard, explicitly indicate that the product is not intended for gearboxes with synchronizers.

On the other hand, the API GL-5 standard no longer always meets the requirements modern technology, which caused the emergence of a new international standard SAE J2360. Accordingly, a natural question arises as to how API GL-4 / 5 gear oils, containing a moderate package of extreme pressure additives for synchronizer gearboxes, are good for use in other highly loaded units.

Lubri-Loy recommends that you carefully follow the vehicle manufacturer's recommendations when selecting gear oil. The Lubri-Loy range allows you to choose the best product to meet your requirements various manufacturers OEM original equipment.

Due to the fact that many modern boxes severely stressed, Lubri-Loy manufactures an API GL-4 oil from a fully synthetic base stock: Lubri-Loy® Premium Synthetic Gear Oils 75w90 API GL-4.

For the harshest operating conditions, including trucks, Lubri-Loy manufactures Lubri-Loy® Premium Synthetic 75w90 GL-5 Limited Slip Gear Oils, a fully synthetic gear oil. API GL-5, Meritor O76-N, International TMS 6816, Mack GO-J, SAE J2360 API MT-1 (PG-1), PG-2, MIL-L-2105E, Eaton Roadranger® 6 x L60-1.

A traditional GL-4 gear oil of any given viscosity has about ½ the level of phosphorus additive found in GL-5, so the surface tension bond is not as strong, and therefore, under heavy loads, brass stripping can occur over time ( wear of box parts). This means that the GL-4 offers slightly less overpressure protection. Therefore, API GL-4 is not quite suitable for high speed hypoid gears.

If GL-5 oil is used in a gearbox that requires GL-4, there will also be a process premature wear synchronizers and gears. This is due to the settling of copper present in GL-5 oil. In the latter, it is 4 times more than in API GL-4 standard oil.

What to do if you can't find the GL-4?

Everything is very simple! An excellent replacement for GL-4 80W-90 gear oil will be SAE oil 50, which meets the CAT TO-4 specification. Interchangeability takes place here, since the operating temperatures are very similar, and, in the case of SAE 50, the level of copper does not exceed the mark indicated on the packaging of GL-4 80W-90.

What is the difference between gl 4 and gl 5?

TO fundamental differences, which nevertheless have some significance, both for the car and the buyer, can be attributed to:

1. Operating ranges of the gearbox. API GL-4 is acceptable for use on cars with "stock" boxes that are not subject to high loads.
2. different viscosity. GL-4 has a lower viscosity, both on a heated box and not.
3. Anti-seize properties. In relation to the above boxes, it is a worthy option, as it has a balanced amount of copper and iron impurities. GL-5 has significantly more copper in its composition, which is sure to harm the low load range box.
4. Price. This parameter, in terms of the difference in gear oils, affects only the buyer / owner of the car.

What oil to choose when changing the configuration of the car?

What to do if you put more powerful engine in the car or increased HP dramatically? A rational solution would be to use GL-4 synthetic oil. It also plays a role price category. How to understand that the oil is chosen correctly and its further use will not damage the box? Here everything should be left to chance or the feeling of "stubbornness" of the box. If this is the case, then it is necessary to replace the selected one with GL-5. The drained oil sample should be sent for analysis, and the new filled one should be analyzed over a similar period of time.

If the sample shows an excess of iron, then clearly GL-4 is not suitable. Gear oil GL-5, due to its higher viscosity, creates an improved protective film, but the amount of copper impurities in the total amount of oil increases. So to say: - a double-edged sword.

If the only solution to protect the box from premature wear is the use of GL-5 oil, then a compensatory measure that will somewhat correct / reduce the amount of copper impurity dropping out will be a filter with a magnet.

Such replacement of the unit entails additional expenses, both in terms of conversion and traditional gear oils. The specificity of the re-equipment involves the replacement of both synchronizers and gears. If synchronizers can still be classified as Supplies, then the latter should be saved, and, in fact, use GL-5. It will be especially useful in cases where the power of the car increases. 100 hp and more.

The main difference and rationality of the purchase

Whatever one may say, the main difference between such oils is gear operating range. So, for example, API GL-4 is used under conditions of varying severity, and GL-5 is relevant for high-speed hypoid gears and drive axles, which, in turn, operate at fairly high temperature conditions alternating with short-term shock loads.
Establishing and maintaining EP properties is very important for any machine that may use any of the above. synthetic oils. Choosing the right one in no way ends in buying and using upper class, even the same API GL-5.

illustrative example

As good example you can take the popular affordable car Lanos. Pouring too expensive oil into his box seems absurd, and, as practice shows, it is irrational. The box, according to the principle of its functioning, refers to the average degree of load. Someone will say that it is better to fill in GL-5 and forget about it. As already mentioned above, this oil It has a high extreme pressure property due to the increased concentration of copper impurity. It is copper, of course, in excessive quantities, that literally in half a year will disable synchronizers and other driving elements. As a result, the potential owner will receive a damaged box and headache as additional article expenses.

API GL-4, in relation to the same Lanos, will cost a little more, since the frequency of scheduled oil changes differs from the above in a larger direction, but it eliminates the possibility of premature wear of the box elements.

Note! Waste oil, whether it be GL-4 or GL-5, cannot be reused in any vehicle component.

Consumers often ask themselves: what fundamental difference between API GL-4 and API GL-5 gear oils? This article will help us understand a little.

Standard oils API GL-4 are used for bevel and hypoid gears (gearbox), as well as for drive axle differentials operating at moderate speeds and loads.
Same standard oils API GL-5 used for high speed hypoid gears and drive axles operating at high temperatures and heavy loads.

The main difference between these oils is EP additive content.

In most gear oils imported and domestic production additives containing sulfur, phosphorus, halogens and most often chlorine are used. Such a composition acts aggressively on the metal, forming compounds that have lower shear resistance during operation and lower melting points than pure metals. Subsequently, jamming and seizing of the contacting surfaces is prevented.

In oils GL-4 added anti-seize components of medium activity, with a concentration of up to 4% .
In oils GL-5 EP additives of high activity are added, and their concentration is already up to 6%.

A higher concentration provides better extreme pressure properties, protection under conditions of high loads and pressures. Sulfur-phosphorus additives create a protective coating on transmission parts. During operation, the contact between the rubbing elements occurs through this coating and thus the parts are protected from wear. However, in contact with non-ferrous metals, this coating is more durable than the surface of parts made of copper or other soft parts. As a result, not only the protective layer is worn, but also the surface of the soft metal element. The use of API GL-5 oils in applications requiring API GL-4 oils results in 2 to 4 times more copper in the oil than API GL-4 oils. As a rule, as a result of this interaction, synchronizers made of copper are the first to be hit. They are subject to increased wear when using lubricants with a high content of sulfur-phosphorus additives.

Let's summarize:

In practice, there is no clear functional separation between these oils. First of all, when choosing a transmission, you should be guided by the recommendations of the car manufacturer.

From the experience of application, I can give a number general recommendations choice of gear oil:

- API GL-4- mainly used in gearboxes. Can also be used in gearboxes with integrated differential ( front-wheel drive). In bridges of old models of technology can also be used API GL-4 while following the manufacturer's recommendations. Equipment operating under heavy and shock loads, most often does not allow the use API GL-4

- API GL-5- used in gearboxes and dispensers. Use in a gearbox can lead to the failure of copper synchronizers.

API GL-4+ And API GL-4/5 - for gearbox with integrated differential (front-wheel drive). These oils have the best anti-wear properties and are not as aggressive to non-ferrous metals.

Why replace something that lasts a lifetime? Optimism goes away when you find in the backyard of the service station a mountain of dead mechanical and automatic boxes taken from cars of one very well-known company. Which? Well, it doesn't matter... The important thing is that the boxes have now become almost disposable! They are trying not to repair them, but to change them entirely - how much will such a replacement cost without a guarantee, do you think? Therefore, the box must be groomed and cherished and be sure to indulge in good oil. Best fully synthetic, 75W-90 viscosity grade, API quality GL-4 - this is perfect for manual boxes.

Sorry, domestic transmission synthetics not seen on the shelves. Only imports - mostly European, mostly German. Instead of GL-4, manufacturers prefer to specify GL-4+, GL-4/5, and GL-3/4/5. So they bought them, as many as a dozen. The run-up in price - from democratic 345 rubles for a liter can of Dutch NGN to 775 rubles for French Motul Gear 300. Is it worth it to overpay? That's why we did the examination.

WHAT DO WE CHECK?

In general, the oil in the box is easier to work with than in the engine. But there are enough problems: it is necessary to simultaneously form the thinnest film and provide gear lubrication. There must be serious protection against scuffing and wear. Therefore, in the characteristics of the transmission, both viscosity, composition, and a set of additives are important.

WHY DID YOU CHECK?

And here's what it's all about. We officially declare: the oils are very different and obviously not from the same barrel. The range of results for individual parameters is not by percentages, but by several times! And the effect does not always correspond to the price. The leader was immediately revealed - the ester Motul Gear 300 has the best performance in terms of welding load, tear index, and critical load. Wear is a little worse, but it’s generally interesting here: none of the tested oils met the requirements of GOST for the TM-5 group. Why is that? Perhaps this is a consequence of a decrease in the content of sulfur and phosphorus in modern products, which previously determined high anti-wear properties. But the result obtained cannot be considered negative either: we choose oil for mechanical boxes group GL-4, where anti-wear indicators are not standardized by GOST at all.

And here is another nuance for which it was worth working. It turned out that antiwear and extreme pressure properties change in antiphase! At the level of intuition, this is understandable. The basic principle of wear protection is to lay something soft, sliding between the parts. And to increase resistance to scuffing, the opposite is required. Therefore, an effective additive package must provide some compromise between two mutually exclusive factors.

Well, what's better? Our advice on "What to choose?" - below. We have arranged the dossiers of all participants in alphabetical order. And there is only one wish: do not dismiss the "boxed" oils.

Until the box brushes you off.

The results differ from each other not by percentages, but by several times!

WHAT, HOW AND WHY WE MEASURED

tribological parameters. They characterize the protective properties of the oil during contact action in gears. Determined according to GOST 9490–75 on a four-ball friction machine: three fixed steel balls at the bottom, one spins with set speed above and the load is pressing on it. The structure is immersed in an oil bath in which the tested oil splashes. And then everything says the behavior of the balls and contact spots. For different types of gear oils, it is normalized by our GOST 17479.2–85 - there are generally accepted ways to interpret the results of such tests. Certainly, foreign manufacturers They are not required to follow GOST, but we live in Russia, and therefore we can take the norms of this document to assess the quality of the oil.

This is the threshold for the destruction of the oil film. GOST does not standardize its value, so let's just think: the higher it is, the better.

Seizure and wear. The main troubles of gearing. They are characterized by a scuff index and a wear indicator. The index is not normalized - in general, the higher the better. The wear indicator for GL-4 oils (TM-4 according to our GOST) is not standardized, but for TM-5 (or GL-5 in our “not ours”) should be no more than 0.4 mm. In general, the smaller the better.

The main parameter by which extreme pressure properties are normalized. It is determined simply: the balls are loaded and loaded until the friction machine stops. For TM-4 oils, the welding load must be at least 3000 N, for TM-5 - 3280 N. Let's take these figures as an evaluation criterion.

Viscosity. At operating temperatures, we evaluate the kinematic viscosity, at low - dynamic. By kinematic viscosity at 40 and 100 °C we calculate the viscosity index, which characterizes the degree of dependence of viscosity on temperature. The range of this viscosity at 100°C for the 75W‑90 grade is fairly wide, from 13.5 to 24 cSt. The higher the viscosity at operating temperature, the heavier the motor, generally speaking. The lower the dynamic viscosity at a negative temperature, the faster the box will warm up and the car will drive better.

Freezing temperature. It's simple: the lower the better.

Flash point. Together with the pour point, to a certain extent characterizes the stability and quality base oil. The higher it is, the usually better the base is, which means that it can be expected that the resource of such an oil will be large.

QUESTION ANSWER

Are these oils suitable for automatic transmissions?

They don't fit. Designed for automatic transmissions special liquids with other properties. Here it is very important to follow the recommendations of the manufacturer, because the ATF fluid ensures the operation of the torque converter, which requires a strictly specified viscosity-temperature characteristic. And for mechanical transmissions these requirements are much more lenient.

What is the difference between GL-4 and GL-5 oils? Or, in our opinion, TM-4 from TM-5?

According to GOST 17479.2–85, the purpose of oils of the TM-4 group is cylindrical, spiral-bevel and hypoid gears operating at contact stresses up to 3000 MPa and oil temperatures in the volume up to 150 °C. And the addressees of TM-5 oils are hypoid gears operating with shock loads at contact stresses above 3000 MPa and oil temperatures in the volume up to 150 °C. Hence the differences in the required protective properties, which are discussed in the article. Therefore, in particular, the transition from GL-4 to GL-5 and vice versa is unacceptable: this different oils with different properties.

Will the use of a more viscous oil reduce the noise of the box?

Yes, it will lower if the noise is due to increased clearances in the box nodes. But within reason, of course. At high degree even the most viscous oil will not save wear.

Should I go for synthetics? Or is the situation the same as with engine oil?

Synthetics are more stable and therefore guarantee greater resource. In addition, she has more high index viscosity, so the low-temperature properties of such oils are better. So there is a certain analogy with engine oils There is.

Why are there such large numbers in the SAE designations if the weather overboard is the same as for the motor?

The numbers indicate the average viscosity range for the oil grade in Saybolt Universal Seconds (SSU). For transmission they are taken directly, for motor ones they are divided in half.

All tables open in full size on a mouse click.

The question of mixing - is it possible or not?

See what to mix. Oils of the same SAE and API groups can theoretically interfere, but in practice - we do not recommend.

Is flushing necessary when changing oil?

If it was originally filled good synthetics, then it is not needed.

Is it possible to fill in a "manual" GL-5 box?

GL-5 is designed for heavily loaded high speed hypoid gears. Its enhanced extreme pressure and anti-wear functions are provided by an increased concentration of additives based on sulfur and phosphorus, which are aggressive towards non-ferrous metals. But in practice, transmission elements are individual, and therefore, in certain cases, the automaker may allow the use of one type of oil in all transmission units.

OIL IN MANUAL TRANSMISSION: WHICH IS BETTER TO CHOOSE?

Nomination "Extreme"

The winner in this nomination guarantees protection of the box under maximum loads.

gold Motul Gear 300.

Nomination "Wear Protection"

gold BP Energy And JB .

Silver taken ADDINOL, NGN And SRS .

Nomination "Energy Saving"

Guarantees best efficiency. For the thrifty, in general.

Winners - Motul Gear 300 And Liqui Moly .

Silver Mobil Mobilube And ADDINOL .

Nomination "Quick warm-up"

These oils are better than others to overcome the cold numbness after a night's sleep.

Oil was the best SRS .

Silver taken BP Energy And Shell Spirax .

Nomination "Price / quality"

Everything is clear from the name.

Clear and winner: NGN .

The Grand Prix

If speak about maximum protection(even for boxes sports cars), then it is difficult to compete with ester oil.

Winner - Motul Gear 300 .

Silver Castrol Syntrax, Mobil Mobilube, Eurol Transyn .

The antiwear and extreme pressure properties of oils appear in antiphase.

REPRESENTATIVES

ADDINOL Gear Oil GH 75W-90

Germany

The price of 1 liter is 420 rubles.

SAE 75W-90, API GL-4/GL-5

Approvals: MIL-L-2105D, VW 501 50

Not a word in Russian on the label! Of the serious advantages - one of the highest indicators of wear protection. But right there as a fly in the ointment - modest results in terms of the tear index and welding load. And low temperature properties are not the best.

Reasonable price.

Relatively low protective properties for bullying.

BP Energear SGX 75W-90 Winner in the category "Wear Protection"

Belgium

The price of 1 liter is 470 rubles.

SAE 75W-90, API GL-4+

Approval: Suitable for VW 501 50

Wear protection is the best, and scuff protection is worse than most. In terms of wear, it came close to the very strict requirements of GOST for oils of a higher group - TM-5. Good low temperature properties and the most heat outbreaks.

The best wear protection, affordable price.

Low bully index values.

Castrol Syntrax Universal Plus

Germany

The price of 1 liter is 550 rubles.

Approvals: MAN 3343S, 341E3; Scania STO 1:0; MB Approval 235.8; ZF TE-ML 02B, 05B, 12B, 16F, 17B, 19C, 21B; SAE J2360

One of best performance welding protection is combined with satisfactory wear protection. Very low temperature solidification - with the lowest viscosity index. At the same time, the highest flash point promises a long resource.

+ High welding load provides long-term protection against scuffing; low pour point.

- Low viscosity index.

Eurol Lubricants Transyn Synthetic

Netherlands

The price of 1 liter is 420 rubles.

SAE 75W-90, API GL-3/4/5 & MT-1

Approvals: Meets ZF TE-ML 01, 02, 05, 07, 08, Volvo 97310, Scania STO 1:0 BOX; MAN 341 TL/341 Type Z-3; MAN 342 SL/342 Type S-1; MAN 3343 S/SL; MIL-L-2105 B/C/D; MIL-PRF-2105E; DAF ZF TE-ML 02 BOX.

Again, not a single Russian word on the bank! But in the "not our" language, on the one hand, it is written in large size that it is synthetic, and on the other, in a much smaller font, it is semi-synthetic ... What to believe? After testing, we believe the second more.

A high welding load, even according to our strict GOST, passes as TM-5.

Worst wear rate.

JB GERMAN OIL Hypoid Getriebeoel GL 4 plus Wear Protection Winner

Germany

The price of 1 liter is 520 rubles.

SAE 75W-90, API GL-4/GL-5 & MT-1

Approvals: MAN 3343 Type S; Scania STO 1:0; ARVIN MERITOR 0-79-N; SAE J2360; MIL-PRF-2105E; ZF TE-ML 02B, 05B, 07A, 12B, 16F, 17B, 19C DAF IVECO

One of the leaders in terms of the number of approvals from automakers, but it’s not clear from the description - “approved” or “corresponding”? Wear protection is excellent, and the badass index is weak. Low temperature characteristics at the level. And at the same time the highest viscosity at operating temperatures!

Good wear protection and low temperature properties.

The worst badass index in the review.

Liqui Moly "High Performance Gear Oil" Winner in the nomination "Energy Saving"

Germany

The price of 1 liter is 620 rubles.

SAE 75W-90, API GL-4+ (GL-4/GL-5)

Approvals: Ford ESD M2C 175-A; VW Norm 50150 (G50); ZF TE-ML 08

Very expensive, but overall not outstanding oil. The tribological parameters are average, low-temperature properties are good, but not the best, the viscosity index is also relatively low. And what is the declared "high performance"?

Handy bottle with built-in grease gun, good low temperature properties.

Expensive for average parameters.

Mobil Mobilube 1 SHC Fully Synthetic Supreme Performance Gear Oil

Sweden

The price of 1 liter is 750 rubles.

SAE 75W-90, API GL-5/MT-1

Approvals: Approved MB - Approval 235.8, MAN M 3343 Type S; MAN 341 E3; ZF TE-ML 02B/05B/12B/16F/17B/19C/21B; JSC AVTODISEL YaMZ Gearbox. Meets Scania STO 1:0; ZF TE-ML 07A

Very decent results in terms of transmission protection under high loads. But at the same time, the lowest viscosity index predetermines weak low-temperature properties. At the same time, the viscosity at operating temperatures suggests relatively low friction losses in the transmission.

Good protective properties.

Very expensive! And a strangely low viscosity index for synthetics.

Motul Gear 300 100% synthetic Winner in the nomination "Extreme" "Energy Saving" Grand Prix

France

The price of 1 liter is 775 rubles.

SAE 75W-90, API GL-4/GL-5, MIL-L-2105D

Ester-based oil immediately stands out from the rest. He has the most high performance for protection against scuffing and welding, for the resistance of the oil film. At the same time, working viscosities do not steal extra “horses” from under the hood. By all indications - the leader of the test.

Best tribological performance in terms of critical load and galling protection.

NGN Synthetic Transmission Oil Winner in the nomination "Price / quality"

Netherlands

The price of 1 liter is 345 rubles.

SAE 75W-90, API GL-3/4/5, MT-1

Tolerances: meets the requirements of MAN 341/342/3343; Scania STO 1:0 BOX; MIL-L-2105 B/C/D-PRF 2105E; Volvo 97310; DAF ZF TE-ML 02; ZF-TE-ML 01/02B/05B/07A/08A

Oil with a name that is not very well known among us turned out to be the most inexpensive, but quite worthy. In terms of basic parameters, it is in no way inferior to the more eminent ones, and in some ways even surpasses them. That is why it gets the first place in the "Price / Quality" nomination.

Low freezing point and a sufficient level of basic physical and chemical parameters, combined with an affordable price.

High viscosity at operating temperatures.

Shell Spirax Axle Oil S5 ATE

Switzerland

The price of 1 liter is 480 rubles.

SAE 75W-90, API GL-4/5

Approvals: Approved Ferrari, Porsche

Claimed for extremely loaded transmissions, however, the tribological performance in all positions is not outstanding. But good low-temperature properties and viscosity at operating temperatures correspond to the declared purpose.

Good protection against scuffing, relatively affordable price.

High viscosity at operating temperatures increases friction losses.

SRS Schmierstoffe Getriebefluid 5L Winner in the nomination "Fast warm-up"

Germany

The price of 1 liter is 490 rubles.

SAE 75W-90, API GL-4 Plus

An oil like no other. Bright green color, and the composition is clearly different. The highest viscosity index determines leadership in low-temperature properties. But viscosity at high temperatures is also large - expect friction losses. Good wear protection.

Low values dynamic viscosity at negative temperatures, good indicator wear.

High viscosity at high temperatures, not the highest EP performance.

Total Transmission Syn FE

France

The price of 1 liter is 550 rubles.

SAE 75W-90, API GL-4, GL-5, MT-1

Approvals: Approved MAN 3343 Type S; Scania STO 1:0; ZF TE-ML 02B, 05B, 07A, 12B, 16F, 17B, 19C; SAE J2360; MB Approval 235.8; MACK-GO-J

High viscosity at low temperatures will lengthen the heating of the box in the cold. At the same time, the working viscosity is decent, which will increase friction losses, but protect the bearings. Of the significant advantages - low freezing point and high flash point.

Good tribological parameters.

far from best index viscosity.