On the market, drivers can find many various models products. 75w90 oil is very popular. In this regard, car owners are often interested in what it is, what characteristics it has, and which brand is best to buy from? 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 the main tasks this liquid should perform. Its use is actually due to several reasons:

• Serves as a lubricant for moving gearbox parts, while significantly reducing wear. Each 75w90 gear oil creates on the surface protective film, which prevents the appearance of microcracks, potholes and other defects on the surface of gears, as well as other parts of the box.
• Removes heat. During the operation of all parts, strong heat is generated. High temperatures can lead to incorrect operation of the gearbox and, accordingly, its rapid breakdown. Oil does not allow this.
• Effective corrosion protection. Almost all metals are vulnerable to the destructive effects of oxidizing agents. To prevent gearbox parts from rusting over time, it is necessary to use quality oil without water content.
• The operation of this unit is associated with a high level of noise, which creates discomfort while driving a car. Transmission oil can significantly reduce vibration and noise from the operation of the gearbox.

Thus, the oil composition must be fluid enough to ensure complete 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 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-season. The first are marked with the usual number (from 80 to 250), and the second are marked with the English letter W (from the word Winter - “winter”). You can buy 70W, 75W, 80W and 85W products on the market. However, period-specific oils are becoming increasingly difficult to find as they have been replaced by all-season products.

In their designation they have two numbers at once, separated by the letter W. Let's find out what 75w90 means. The first number 75W is the so-called winter indicator fluidity. The parameter indicates the extremely low temperature at which the oil will perform its tasks. For this oil the minimum working temperature is -40 degrees Celsius.

The second number (90) is the summer viscosity indicator. In practice it shows the maximum temperature environment 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 temperature regime 75w90. Based on these parameters, we can conclude that the oil is ideal for use in temperate latitudes.

Performance characteristics

Decoding 75w90 gear oil by viscosity may not be the only designation. Many products are also classified according to API, which provides a comprehensive rating of transmission fluid based on performance characteristics. In total, six groups can be distinguished. IN modern cars products of only two of them are used:

• GL-4 (or domestic classification TM-4). Such products are intended for medium-load transmissions. As a rule, oil of this class is used in manual transmissions, as well as in mechanisms using spiral bevel gears. Oils can also be used in hypoid-type gears, but only with low torque.
• GL-5 (TM-5). Used in heavily loaded transmissions, in particular in hypoid gears ah with low torque, but subject to short-term shock loads. The product is characterized by a high level of sulfur-phosphorus containing extreme pressure additive.

Many car owners will be able to find 75w90 GL 4/5 gear oil. Such transmissions can be used in different conditions loads, while for the most part they are a universal option between GL-4 and GL-5.

What are the differences between oils marked GL-4 and GL-5

As mentioned earlier, the first and most important difference is the scope of application. 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 transmission in combination with shock loads. Such devices operate at stresses above 3000 MPa. The oil is used in units with limited slip differentials, providing high-quality protection 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 durable protective layer, which is much harder than some soft alloys such as copper. The use of GL-5 oil in boxes where it is necessary to use oil of a lower class is unacceptable. This will lead to a large amount of metal shavings and wear of spare parts.

What to look for when choosing oil

When purchasing, you should focus not only on the brand, the price of the product, but also familiarize yourself with several other important characteristics product. This may include:

• Viscosity. Transmission oil must maintain its viscosity in a certain temperature range in order to properly perform its main functions. Here, when purchasing, be guided by the above-mentioned SAE classification.
• The difference between the pour point and ignition temperature should be maximum. Be sure to take this into account.
• Critical load. The higher the number, the higher the quality of the presented product.
• Bully index (the higher the index, the better).
• Welding load. According to GOST regulations, the parameter must be below 3 thousand newtons;
• Wear indicator. Relevant only for products class GL-5. High-quality oil should have no more than 0.4 millimeters.

These are the main characteristics of 75w90 oil, which are worth paying utmost attention to.

Synthetic or semi-synthetic

Typically, drivers will find 75w90 synthetic gear oils on store shelves. At the same time, you can also find semi-synthetics. The first ones have best performance among all types of lubricants. The advantages of such products include:

• Optimal operating temperature range.
• Maintains fluidity when exposed to sub-zero temperatures.
• Hydrolytic stability.
• Low volatility and oxidation resistance.
• Long service life.
• High viscosity index.

A noticeable disadvantage for many car owners is the high cost of synthetics, so alternative option is semi-synthetic oil, which is slightly inferior in performance to the product described above, but has more affordable price tag. In other words, the difference in synthetic content is about 20-40 percent, and the amount of additives can differ by 15 percent.

Gear oil rating 75w90

It’s worth noting right away that the best 75w90 gear oil is the one recommended by the manufacturer. IN technical manual you can find for your car necessary information. Such products are developed specifically for your foreign car, so they meet all requirements. But if cash squeeze, you can purchase another gear oil 75w90 GL-5 or GL-4 from a third-party manufacturer. The TOP described below will help you with this.

The product occupies one of the leading positions in numerous tests Motul Gear 300. Gear oil is characterized high index anti-scuff protection (60.1) and excellent welding performance. The oil film is different high stability, therefore optimally minimizing friction of parts. The wear indicator is 0.75 millimeters. A small drawback are poor viscosity indicators at sub-zero temperatures.

Castrol Syntrans Transaxle, which can be placed in second place, is very popular. Low temperature fluidity, sufficient high level bully and relatively low price make this gear oil popular with many drivers. The fluid also boasts a high wear level (59.4).

If for some reason you are not satisfied with Castrol products, order a product from an equally popular brand. Mobil Mobilube ranks third. This brand of oil provides outstanding viscosity-temperature properties, optimal protection against thermal degradation and oxidation, and is also capable of operating at extended maintenance intervals. Oil has API marking GL4/5.

Another universal oil according to API is Total Transmission SYN FE. The level of scuffing is not far from the products described above. 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 mentioning separately the turnover rate. The oil retained its performance qualities even at a temperature of -40. The transmission extends the service life of components and perfectly protects gearbox components from rust.

If the priority is to reduce gearbox noise and ensure maximum protection from scuffing, we recommend purchasing ZIC G-F TOP. The oil can withstand extreme loads without problems, while performing excellently in wide range temperatures An alternative high-quality option is Transyn gear oil, the main feature of which is a high wear level of 0.94.

How not to buy a fake

Careful selection of oil based on characteristics and numerous parameters will be useless if you buy a fake produced in “handicraft” conditions. Such oil will not cope with its functions and can also lead to accelerated wear and further breakdown of the gearbox.

When purchasing, be sure to check the date of manufacture, the quality of the printed label and the presence of various markings. The plastic canister and lid must have the manufacturer’s signature design. First check on the Internet what the desired oil looks like. These few tips will help you buy original certified products.

Lubricants that are intended for use in gearboxes and drive axles are called transmission oils. Motor oils for transmission and engine are classified the same way. The main characteristics of the oil are: viscosity parameters, performance indicators, corrosion resistance. Gearbox lubricants, like regular ones, have their own markings. Drivers should know what it means.

Transmission oils can be classified according to five different specifications: SAE, API, ZF, MIL, and specific vehicle manufacturer approvals. All gearbox lubricants must meet modern requirements to oily liquids. Gear oil 75w90 is one of the most common petroleum products.

Viscosity indicators 75w90

According to SAE, oils are divided into types depending on the viscosity index. The breakdown of oil 75w90 is as follows:

• 75w - indicates how fluid the car oil is in cold conditions. The smaller the number in front of the letter, the more fluid the oil is. The minimum temperature limit is minus forty degrees;
• 90 – characterizes viscosity at high temperatures. The maximum temperature limit is plus thirty-five degrees.

For what reason is SAE 75w90 so common in Russia? Is it possible to make an oil that can be filled in an even wider temperature range? Everything is somewhat more complicated. Protection of contacting parts from friction directly depends on the quality of lubrication. Although this characteristic only improves with increasing viscosity index, the law of resistance begins to operate. The gearbox loses more power because it needs to expend energy to squeeze the oil out from under the teeth. Also, the viscous lubricant becomes too thick in winter. Thinner oil feels better in cold conditions, but forms a film with less strength and lubricates spare parts less well. To balance these 2 parameters, special additives are used.

In temperate climates, it is advisable to choose lubricants such as 75w85, 80w90, 75w90 BO. For hot conditions, it is optimal to use 75w140 oils.

Transmission fluid performs the following tasks:

• elimination of friction, scuffing, and other damage;
• reducing energy losses, increasing productivity;
• heat removal from contacting parts;
• reduction of noise and vibration from operating spare parts.

Between motor oils 75w90 from various manufacturers There is a difference in both characteristics and cost. Typically this petroleum product is synthetic. Sometimes manufacturers write on the canister that it is semi-synthetic gear oil. It has only one difference from synthetic, which is the small content of additives.

API classification

The API specification classifies oils based on their performance characteristics. All of them are divided into 6 types. Each type has its own index, this allows you to understand the scope of use and quality of the petroleum product. Today, GL4 and GL 5 motor oils are used in passenger car transmissions.

• GL 4 – intended for gearboxes with medium load. Used in mechanical spiral bevel transmissions. Oil can be poured into hypoid gearboxes when high speeds and small torques;
• “GL 5” - intended for gearboxes with heavy loads. Oil is poured into hypoid gearboxes. The composition contains many additives that resist scuffing, consisting of sulfur and phosphorus.

Rating of the best 75w90 lubricants for gearboxes

The following characteristics must be taken into account:

• Viscosity index. Motor oil must maintain its own viscosity in different temperature conditions;
• Temperature indicators. Any petroleum product has its own pour point and flash point. The lubricant must cope with its tasks over a wide temperature range;
• Maximum load. The more this parameter, the better the oil;
• Badass index;
• Welding load. The parameter must be at least 3,000 N;
• Wear characteristics. It is only relevant for API GL 5 lubricants; it must be at least 0.4 mm.

According to many indicators, Motul Gear 300 75w90 GL 5 motor oil is in 1st place. It perfectly protects parts from scuffing and forms a stable lubricating film. But in winter it is not recommended to pour this oil product.

Mobil Mobilube is in 3rd place. A test of gear oils showed that it provides good protection against wear, but is not suitable for use in cold weather.

Comparison of 75w90 with other oils

80w90

LS 80w90 is a universal transmission oil consisting of a base fluid and additives. LS 80w90 provides excellent performance. LS 80w90 is intended for rear axles vehicles with hypoid gearboxes equipped with limited slip differentials.

Advantages of semi-synthetic LS 80w90:

• formation of a strong lubricating film;
• effectively prevents the formation of foam, excellent compatibility with sealing elements;
• consistency of operating indicators over a long period, this significantly reduces the frequency of oil changes;
• excellent corrosion resistance.

75w80

High-quality synthetic Shell 75w80 is used in gear transmissions. The lubricant has a long service life and reliably protects modern transmissions.

Description of the advantages of the lubricant:

• increase in unit productivity;
• precise gear shifting in various operating modes;
• resistance to scuffing, wear, pitting;
• environmental friendliness.

75w140

75w140 GL 5 is a synthetic that was developed for high-load gearboxes. Used in manual transmissions of cars, vans, trucks, minibuses, and special equipment.

Pros of motor oil:

• ensures uninterrupted operation of the transmission;
• thermostable;
• creates a durable film of oil on contacting parts;
• resists corrosive effects;
• does not foam.

What are the consequences of changing GL-4 to GL-5?

“Four” is intended for transmissions operating under medium loads. "Five" is optimal for hypoid gearboxes, drive axles operating in harsh conditions.

It is worth remembering that GL-5 contains a large number of additives that resist scuffing. They do not go well with bronze synchronizers in the gearbox. If you change the “four” to “five”, your car will start with a grinding noise and will probably break down soon.

Now you know what the characteristics of 75w90 oil fluid are, when to use it, and when to use other lubricants. Testing has shown that it is optimal for Russian climatic conditions. It is necessary to take into account the recommendations of the car manufacturer as specified in the operating manual. The manufacturer knows what kind of oil should be poured into the engine/transmission own cars, much better than all the others.

Transmission is one of the most important nodes, which ensure normal operation of the car. This mechanism requires timely maintenance. The choice of lubricant must be approached as responsibly as possible. The duration of operation of the gearbox, as well as other components and mechanisms, depends on the quality of the selected substance.

In great demand today gear oil ZIC 75W90. Reviews about the presented product will help to draw a conclusion about its quality. The presented product has existed on the market of special products for cars for a long time. What ZIC lubricant is will be discussed further.

Manufacturer

Transmission oil (synthetic) ZIC 75W90 (specifications, reviews, photos presented below) belongs to the category of new generation high-tech products. It is produced by the South Korean manufacturer SK Corporation. This brand is known as one of the major suppliers of lubricants for Asian mechanical engineering enterprises.

Almost all cars that come off assembly lines in China, Japan, and Vietnam are provided with oils produced by SK Corporation. When producing its compounds, the South Korean company takes into account the highest requirements of modern mechanical engineering. Thanks to this lubricants fully comply with the technological and environmental requirements of the world community.

The products of the presented brand are in demand in our country. This is explained reasonable cost and high quality compositions. The presented products reliably protect mechanisms and components from premature wear.

general characteristics

Transmission oil ZIC 75W90 (synthetic), characteristics which will be presented below, has a number of features. This product is manufactured using the latest scientific developments. Thanks to its special formula, the lubricant significantly improves the performance of gearboxes.

The presented product is intended for manual transmissions. It is also used for bridges of trucks and passenger cars. Gear oil in this category is suitable for construction equipment.

This product reliably protects transmission parts from scuffing and mechanical damage. This is a fairly universal remedy. It can be used in various conditions. When choosing a lubricant, you must follow the recommendations of the manufacturer's instructions.

Property Basis

Using a high-quality base, it is produced gear oil ZIC 75W90. Semi-synthetics and synthetics today are the most popular substances from which they are produced Consumables for gearboxes. The most popular synthetic lubricants. They are made on the basis of special, high-quality oil. It is created using Yubase technology.

The oil base also includes PAO components and balanced additives. Synthetic oils promote rapid distribution of the product within the system. They envelop all the details with a thin layer. This allows the moving elements to slide well.

Semi-synthetic products contain mineral oils. Such compositions are suitable for medium-load conditions. Such substances are replaced earlier than synthetic oils. But their cost will be slightly lower. A synthetic product for manual transmissions made in South Korea provides reliable transmission protection even under high, constant loads.

Specifications

Considering reviews of gear oil ZIC 75W90 (semi-synthetic, synthetics), the high popularity of the GFT series product should be noted. Its technical characteristics indicate the high reliability of the product.

The density of the composition at 15ºС is 0.86 g/cm³. In this case, the kinematic viscosity at 100ºС is 14.1 mm²/s. The quality of the product is confirmed by the high flash point. The oil ignites when it reaches 212ºС. When a car transmission is operating, such temperatures are practically unattainable.

The oil begins to lose its fluidity at a temperature of -47.5ºС. This is a very good indicator. The transmission will operate reliably even in severe frost. Acid number meets the requirements of the standards. It is 1.48 mg KOH/g. Experts claim that the data presented by the manufacturer is completely true.

Lubricity

Considering characteristics, reviews of gear oil ZIC 75W90 (synthetic), which are left by experts in the field of lubricants, it is necessary to note the exact compliance with the standards of the product presented.

The South Korean manufacturer's oil for manual transmissions is manufactured in accordance with GL-4, GL-5 standards. These standards apply to the production of all transmission fluids.

Compliance with the presented compositions indicates the possibility of using the oil in medium and highly loaded systems. Includes sufficient quantity additives that can reliably protect the mechanism from adverse effects. Even with an increase in temperature and rotation speeds of mechanisms, the oil will ensure good sliding of the rubbing metal parts.

Additives

Reviews of gear oil ZIC 75W90 speak about the high reliability of the presented product. IN basic foundation the manufacturer adds a balanced package of additives. If a different oil was previously used in the transmission, the system will need to be thoroughly flushed. Additives, entering into a chemical reaction with other components of the old substance, may lose their protective properties.

The South Korean brand oils contain only new, high-quality components. They have several effects on the system. Anti-seize ingredients ensure good sliding of mechanism elements. The oil film does not break and dry surfaces do not appear.

Also contains antioxidant additives. They prevent the development of corrosion and oxidation. The oil can be used for a long time. His additional filling or complete replacement may be required much less frequently.

Lubricants are very important for every car, but choosing a good one can be difficult. We conducted a transmission oil test and prepared its results for you. The material will also describe in detail how exactly the examination and testing of transmission oils was carried out.

Automotive transmission oils are necessary for lubricating contacting parts in complex components and mechanisms. Thanks to this, their service life is extended and the need for expensive major repairs is postponed. All kinds of transmission fluids are sold in stores, and the results of our examination will help you make the only right choice.

Features of the oil test

Transmission fluid, designed to lubricate gears, acts as a preservative. It creates a special protective layer that prevents the formation of scoring on the surface and welding of metal parts upon contact. In this regard, the wear resistance and service life of the gearbox will depend on the quality of the protective properties of the fluid under harsh operating conditions.

Service station specialists have to regularly overhaul transmissions that fail due to improper maintenance or the use of unsuitable oil. Thinking about this, the question of choosing the best oil begins to interest. Pick up optimal liquid The results of an examination carried out by specialists in special conditions help.

Modern gearboxes are very complex in design, so their normal functioning requires high-quality and regular maintenance - this involves replacing the transmission fluid. It is easy for an inexperienced motorist to get confused in the assortment of oils sold in markets and car dealerships. To make your choice easier, we have prepared the results for you. interesting test transmission oils.

Properties of lubricating fluids

Experts determine the properties of automobile oils taking into account their performance characteristics and symptoms that arise during the operation of the liquid. Among the main operating parameters of gearbox lubricants are the following:

• fluidity;
• physicochemical characteristics;
• cleaning abilities;
• lubricating properties;
• temperature;
• anti-corrosion;
• antioxidant.

Gear oil manufacturers use special additional components aimed at improving basic characteristics liquids. Thanks to them, the liquid provides the following benefits:

• neutral to water and rubber seals;
• wear resistance of parts;
• preventing the appearance of scoring on gear elements;
• antifoaming properties;
• non-susceptibility to oxidation;
• non-toxic.

Motorists are usually guided by reviews from friends or read specialized forums before buying new gear oil for their car.

How are lubricants classified?

The transmission oils we tested are classified into several categories, and all fluids differ in a number of parameters:

• kinematic viscosity;
• dynamic viscosity at low temperatures;
• operational characteristics.

Transmission fluids that have the best performance and are considered universal belong to the fifth group. Today on Russian market and all over the world they use the SAE J306 system for dividing the viscous properties of transmission fluids. This classification details the properties of lubricants according to their fluidity depending on temperature.

According to the American classification, all transmission oils are divided into nine categories:

• 4 winter oils 70W, 75W, 80W and 85W;
• 5 year olds 80, 85, 90, 140, 250.

There are also all-season liquids whose labels indicate both parameters at once, for example, 85W-90. All-season fluids are more economical to use and last up to two years without replacement. Our test involved gear oils marked GL-4.

What was checked during the examination?

The conditions for using transmission fluid are not as severe as those motor oil. At the same time, for normal functioning and long-term service of the node, it is still required special lubricant, able to withstand work impacts. The test verified the creation of an oil film that reduces wear and prevents scuffing on rubbing parts.

The main goal of our examination was to identify differences between lubricants different manufacturers, and not in price, but in the main performance characteristics, taking into account the requirements for oils.

After checking, we were convinced that the difference in the results was so great that the test was not carried out in vain. We also learned that a higher price is not an indicator of higher quality.

For example, Motul Gear 300 oil turned out to be the best for the following characteristics:

• scoring parameters;

When checking for wear, not a single oil of the TM -5 group was able to surprise (we were guided by GOST). Probably the reason is a drop in the concentration of phosphorus and sulfur in the initial raw materials. It is impossible to speak unequivocally about a negative result, since imported gearbox lubricant was tested, to which Soviet standards cannot be applied.

The tests revealed results, some of which confirmed the opposite effect of the lubricant on wear resistance and scuffing prevention. For wear resistance, a buffer is needed between the rubbing elements.

How was the examination carried out?

When testing transmission oils for tribological parameters, special laboratory equipment was used. The technology for checking the main operating parameters is based on the use of a mechanism equipped with four metal balls in an oil container.

One of them moves and comes into contact with the rest of the stationary balls. In this case, a certain speed is set and additional load pressure. Information is read from the contact points of the balls. The results obtained were subsequently compared with GOST 17479. 2-85.

GOST has a concept called “critical load”. The phenomenon is characteristic of the case when the lubricating film begins to collapse and direct contact of the contacting elements occurs. Of course, imported manufacturers are not guided by GOST requirements, but for Russia, checking such parameters is the norm.

GOST does not exactly indicate special requirements for critical loads for oil intended for transmissions. In this regard, it was checked how long the oil film would withstand increased operating loads.

As for the viscosity index, it was assessed according to two parameters: at operating temperatures from 40 to 100 degrees, kinematic viscosity was measured, and at low temperatures, dynamic viscosity was measured.

Determination of viscosity coefficients made it possible to determine the properties of the oil. The higher the viscosity, the higher the load on the motor. The lower the dynamic viscosity, the better the components of the box heat up and the easier the running. Important role Solidification parameters also play a role: the lower the oil thickening temperature, the better.

Motul Multi ATF

This transmission fluid is considered a high-tech product with a wide range of uses. The lubricant is suitable for power steering and automatic transmissions. The basis for this fluid is synthetic oil containing special additives with antioxidant and anti-foaming properties. The product works effectively under the influence of different temperatures, both high and low. Among the features are high lubrication characteristics, which have a positive effect on minimizing friction. Oil also causes good protection gears.

When using Motul Multi ATF oil, gear shifts are softer and smoother.

This oil corresponds to its counterparts in API GL-5 class. This fluid is intended for manual transmissions of any design - with teeth or hypoid. You will learn from a separate material on the site.

This oil has a long service life and contains many high-quality additives that have a number of positive characteristics:

• anti-corrosion;
• anti-wear;
• anti-scuff;
• antioxidant.

So using of this oil significantly prolongs and increases the reliability of transmission parts in a wide temperature range and under high loads.

Liqui Moly Top Tec ATF 1200

The transmission fluid has good performance characteristics, and most notable is its high resistance to oxidation and wear. The high efficiency of the composition, which meets the standards of many manufacturers, is maintained even when used under conditions of severe loads, as well as at highly variable temperatures. Liqui oil Moly Top Tec ATF 1200 is designed specifically for automatic transmissions.

Ravenol VSG SAE 75W-90

This lubricating fluid For transmissions, it also performed well during our test. The oil is synthetic and has a high level of quality. It provides reliable protection against wear of the gearbox and all transmission parts subject to loads. Due to the synthetic base, the liquid can be used even in severe frosts.

The oil is produced using hydrocracking technology. The liquid contains the latest unique additives with high operating efficiency. The test showed that Zic lubricant Dexron III promotes high protection of working parts that are forced to endure high operating loads. As for the viscosity index and operational parameters, they are quite high. The scope of use of the fluid comes down to automatic transmissions.

Castrol Syntrans Universal Plus SAE 75W-90

This oil has a synthetic base and contains many additives that provide good antioxidant properties and performance characteristics. The examination showed a high level of wear protection. The oil is suitable for hypoid and cylindrical gears. Among the advantages of Castrol Syntrans Universal Plus SAE 75W-90 fluid is its ability to operate in a wide temperature range. Oil is used in manual transmissions with synchronizers, and the synchronization process with this oil is greatly facilitated.

A car today is quite an expensive pleasure. We are talking not only about the price of the car itself, but also about the constant increase in the cost of gasoline, taxes and expensive spare parts. Therefore, many car enthusiasts take good care of their vehicles, trying to extend its life so as not to invest large amounts of money in repairs.

Some people are confused when it comes to transmission oils and gearboxes. They ask the question: why change something that should work all your life? But this is not so, especially when in auto repair shops you see dozens of dead checkpoints and the questioning faces of motorists. Without delving into the technical details, it is obvious that the gearbox, whether automatic or manual, requires careful handling and high-quality oil.

Obviously, oil manufacturers have reached unprecedented heights: today on the market you can find dozens of types of gearbox fluids to suit any needs of car enthusiasts. Therefore, we have compiled a rating of the best and most optimal gear oils with detailed description and identified distinctive features. When compiling the list, we relied on the following criteria:

• Experienced opinions from technical experts
• Real reviews from car enthusiasts
• Ratio of price and quality characteristics

Best synthetic gear oil

This type of oil is stable over long-term vehicle operation, unlike semi-synthetic or mineral ones. Synthetics have greater fluidity and viscosity, which are not so dependent on temperatures. This indicates a wide operating range of this oil, and it is also less susceptible to oxidation. The main disadvantage is the relatively high price.

5 Shell Spirax S4 G 75W-90

Specialized oil for VW cars
A country: Netherlands (manufactured in Germany)
Average price: 499 rub.
Rating (2019): 4.5

Especially for cars and trucks Volkswagen cars Shell Spirax S4 gear oil has been developed. It can work successfully in the harsh Russian climate. Loss of fluidity occurs only when the temperature drops to -42°C. The product is intended for use in mechanical transmissions; it can be used in modern synchronized units, which must be filled with synthetics. The high performance properties of the synthetic material have been confirmed by laboratory tests; the tested units have successfully worked for 20 million km.

For car owners no special complaints to the transmission Shell oil Spirax S4 no. Some users felt it was easier to engage gears, while others claim that shifting became more rigid. Unfortunately, the use of lubricant is limited to VW vehicles.

4 Castrol Syntrans Transaxle GL-4 75W-90

Enhanced anti-scuff properties
Country: Germany
Average price: 746 rub.
Rating (2019): 4.6

Castrol Syntrans Transaxle gear oil has a fully synthetic base. Distinctive features of the lubricant are enhanced extreme pressure properties. The product is intended for mechanical transmissions which require API GL-4 fluid. The oil provides protection for rubbing parts in gearboxes and drive axles during cold starts by maintaining fluidity.

Many car owners have already experienced the benefits of German gear oil. A quality product can be purchased at almost any auto store. As soon as motorists began to fill the transmission, the noise in the transmission decreased, and gear shifting became clearer. There are no problems with driving in severe frost. The disadvantages of the product include the high price and a large number of counterfeits on the Russian market.

3 Liqui Moly Hochleistungs-Getriebeoil 75W-90

Best wear protection
Country: Germany
Average price: 1013 rub.
Rating (2019): 4.6

The third best synthetic transmission oil is the product Liqui Moly with a strange German name. It meets all international requirements. It is used in manual transmissions and hypoid axle gearboxes. The API GL-4 standard allows the oil to be used in passenger cars. The manufacturer claims that Hochleistungs-Getriebeoil is the best oil for wear protection. This is confirmed by many years of practice.

Advantages:

• High quality chemical components
• Wear resistance
• Withstands extreme loads
• Excellent protective properties

Flaws:

2 MOTUL GEAR 300 75W-90

Best performance indicators
Country: France
Average price: 1130 rub.
Rating (2019): 4.8

Expensive and elite MOTUL oil GEAR 300 stands out from the rest not only in price, but also technical features. This product has the highest performance, quality and reliability. Why is it used in sports and racing cars. SAE classic – 75W-90, API standard– GL4. Viscosity under extreme loads does not affect the vehicle's power: horsepower"do not decrease." MOTUL is recognized as a leader in many properties, which is why it has such a price. Overall, an ideal option if you have the means.

Advantages:

• For high and shock loads
• Maximum development of oil composition
• The film has increased resistance under pressure
• Oil properties reduce wear and friction

Flaws:

• High price

1 ZIC G-F TOP 75W-90

Better low temperature fluidity
Country: South Korea
Average price: 429 rub.
Rating (2019): 4.9

At the top of the ranking among synthetic oils is ZIC G-F TOP. Ideal for regions with low temperatures due to its cold resistance, which allows the oil to be fluid and viscous in any frost. A separate feature is the low probability of counterfeiting, because the manufacturer uses special technology making a canister. Car enthusiasts note that when using ZIC TOP, noise in the transmission is reduced. Another feature is that this oil is effective under extreme loads.

Advantages:

• Thermal-oxidative stability
• Anti-friction properties
• Compatible with materials inside the gearbox
• Optimal price

There are no disadvantages.

The best semi-synthetic gear oil

Semi-synthetic oils are cheaper than pure synthetics, but they have average characteristics and properties because they are a mixture of two other types. Good viscosity indicators and compatibility with other types of oils are excellent advantages. However, semi-synthetics require more frequent replacement, and temperature Range less than synthetics.

5 Ravenol ATF MM SP-III Fluid

The widest range of packaging
Country: Germany
Average price: 511 rub.
Rating (2019): 4.5

German gear oil Ravenol ATF MM SP-III Fluid is designed for use in MITSUBISHI cars, KIA and HYUNDAI equipped with automatic transmission. The semi-synthetic base is obtained by hydrocracking, in order to give the material anti-corrosion and anti-friction properties, a set of additives based on polyalphaoleins is added to it. The product retains excellent lubricating properties at low temperatures. The pour point is -48°C. The oil behaves neutrally towards non-ferrous metals and transmission sealing parts.

Motorists are attracted by the affordable price of gear oil, a wide selection of packaging (1, 4, 10, 20, 60 l), stable work in different automatic transmissions. Among the disadvantages, there is a large number of counterfeits on the domestic market, so you should purchase oil in trusted stores.

4 LUKOIL ATF

Multi-grade oil for severe conditions
Country Russia
Average price: 275 rub.
Rating (2019): 4.6

Domestic oil refiners have managed to develop gear oil with unique properties. The LUKOIL ATF product is an all-season semi-synthetic, which is intended for automatic transmissions. The lubricant not only maintains its viscosity over a wide temperature range, it remains stable under high loads in transmission units. After production tests, the oil received approval for use in serious mining dump trucks BelAZ. The products meet the stringent requirements of Caterpillar, MB and GM. Over time, the oil does not deteriorate; it behaves neutrally in relation to the sealing elements.

Users note the affordable price of the material, high quality, and reliable protection against counterfeiting. The oil is popular in vehicle fleets where a lot of hydraulic equipment operates.

3 LIQUI MOLY Hypoid-Getriebeoil TDL 75W-90

Versatility
Country: Germany
Average price: 545 rub.
Rating (2019): 4.6

The German manufacturer produced universal oil. It is used for all types of drives because it belongs to the Total Drive Line classification. Moreover, API GL-4/5, which indicates the presence of double approval. This means that this oil is suitable for most gearboxes. This versatility is complemented by anti-friction properties, wear resistance and other pleasant features. Generally, best option, excellent value prices and quality.

Advantages:

• Versatility of use
• Anti-corrosion properties
• Wear resistance

Flaws:

• Strict oil change intervals

2 Hyundai ATF SP-III

Better oxidation stability
Country: South Korea
Average price: 620 rub.
Rating (2019): 4.7

The Korean manufacturer did not skimp on “stable” oil. Ideal option for HYUNDAI and KIA owners. This oil allows the gearbox to operate over a wide temperature range. Friction properties excellent, and also an important feature - one of the best compatibility with many metal products, which protects the box from wear and tear.

Advantages:

• Wide temperature range
• Metal compatibility
• Wear resistance

Flaws:

• Narrow use

1 Elf Tranself NFJ 75W80 GL4+

Best extreme pressure performance
Country: France
Average price: 583 rub.
Rating (2019): 4.9

The French manufacturer managed to create the most optimal option with the best extreme pressure characteristics. NFJ 75W80 has excellent temperature stability: it thickens slightly when the temperature drops, and does not become extremely liquid at high degrees. The oil's properties make it easier to change gears in cold weather and also reduce noise due to its strong viscosity stability against shear. The gears don't change on their own. Mechanical components receive reliable protection due to the chemical properties of the oil.

Advantages:

• Protective properties
• Wear resistance
• Stability of characteristics
• Excellent friction properties
• Enhances wear protection of transmissions, especially mechanical components

No deficiencies found.

Best mineral gear oil

Mineral oils are the cheapest type because their production does not require serious technology. In fact, the price determines the characteristics of the oil: they are optimal and worth the money. The viscosity of this type is high, but the quality leaves much to be desired. Therefore, sometimes it is required frequent replacement. U mineral oil low temperature range, and also contains impurities due to poor purification. Overall, a good option if you don’t have the opportunity to purchase more expensive oils. Although sometimes nothing else is required.

5 MOTUL Gearbox GL 4/5 80W-90

Maximum lubricity
Country: France
Average price: 790 rub.
Rating (2019): 4.5

A well-known French manufacturer managed to create gear oil based on mineral based with outstanding lubricity. Thanks to this quality, the liquid can be poured into manual transmissions, drive axles, and hypoid units that do not have automatic locking. The reduction in friction between the mating parts of the transmission occurred due to the addition of molybdenum disulfide to the composition. The connection makes the oil film impenetrable, it is preserved even under harsh operating conditions. The lubricant withstands chemical and mechanical stress and does not foam during operation.

Users consider the product to be the best mineral transmission. It can be used both on domestic Nivas and imported SUVs. Noted low level transmission noise, which proves good lubricating properties. One of the disadvantages is the high price for mineral oil.

4 MOBIL ATF 320

Universal oil for automatic transmissions
A country: USA (made in Switzerland)
Average price: 517 rub.
Rating (2019): 4.6

A wide range of tasks can be solved by transmission MOBIL oil ATF 320. The product is created on a mineral basis, it can be poured into automatic transmissions (and some manual transmissions), power steering, drive axles, etc. The lubricant is also suitable for use in agricultural machinery, construction machines, hydraulic systems industrial equipment. Technical fluid meets Dexron III, ZF TE-ML-04D/17C approvals. Numerous tests confirm the high quality of the oil, as well as long term operation.

Users are satisfied with the quality of the product, wide range of applications, efficient work over a wide temperature range. Protection of transmission parts occurs from the first seconds after a cold start. The only deterrent to purchase is the high price of mineral oil.

3 Lukoil 80W90 TM-4

Best price
Country Russia
Average price: 121 rub.
Rating (2019): 4.6

Russian Lukoil is the leader among manufacturers in the Russian Federation. This oil differs in price, as well as the addition of an additive package. The scope of application is wide: cars, trucks, equipment and other mechanisms. Excellent wear resistance for 120 rubles, as well as anti-oxidation and anti-corrosion properties. You shouldn't expect much from this oil, but this product is one of the leaders in this category. Despite its relative versatility, the oil is suitable for GM-4 systems. Overall, a fairly effective oil at an extremely reasonable price.

Advantages:

• Simple composition
• Good resistance to low temperatures
• Good lubricating properties

No deficiencies found.

2 Total TRANSMISSION GEAR 8 75w-80

The optimum ratio of price and quality
Country: France
Average price: 390 rub.
Rating (2019): 4.7

Total pleases with its attitude towards consumers: they managed to develop the most optimal gear oil. Price and quality are in direct correlation: the cost is adequate to the properties, and the duration of use is impressive. GEAR 8 has properties that allow you to avoid changing the oil as often as is common among mineral products. Many users note that it has no disadvantages as such. This is an ideal option for Russian cars and for any others with manual transmission. The film from this oil is quite resilient and elastic, which creates excellent protection for the mechanisms and gears of the box.

Advantages:

• Price and quality
• Optimal flow and viscosity properties
• Withstands low temperatures

No deficiencies found.

1 LIQUI MOLY Getriebeoil 85W-90

High anti-corrosion properties
Country: Germany
Average price: 423 rub.
Rating (2019): 4.8

Getriebeoil mineral oil is the highest quality of the components used and the use of a set special additives, which provides excellent properties and reliable operation. This oil is suitable for all-season use, which means winter period the oil will not thicken excessively. It is assumed that Getriebeoil can be filled for all types cylindrical gears, which indicates a wide scope of application. Chemical properties ensure compatibility with most types of seals. Overall, this German oil suggests high reliability, protection from rapid wear and pleasant operation of the gears in the gearbox.

Advantages:

• Wear resistance
• Withstands low temperatures
• Wide range of uses

Flaws:

• High price for mineral oil

How to choose gear oil?

Choosing oil is a responsible decision, so you need to know a few simple rules. We've put together a short list of tips to help you choose the best option.

1. Price oils are not a determining criterion for selection. High price does not guarantee that the oil will work perfectly.
2. First of all, gear oil is selected relatively gearboxes. A wide range of oils are used for manual transmissions, while for automatic transmissions a special low-viscosity fluid has been developed, which is labeled ATF (Automatic Transmission Fluid).
3. Particular attention must be paid to the specific loads inside the box mechanism and the relative sliding speed. Knowing them, you can choose the right oil.
4. The next criterion is the quantity extreme pressure additives, as they may contain elevated levels of sulfur compounds. This can lead to corrosion of non-ferrous metals, but such additives also provide increased protection for the main mechanisms of the unit.
5. Marking by operational properties: GL-4 and GL-5. The first type of oil is excellent for front wheel drive cars, the second is for everyone else. There is also a universal GL-4/5, which is suitable for most types of transmissions.
6. Viscosity parameter– SAE. The classic “all-season” is 75W-90, it maintains a wide temperature range. The letter W means that the oil is intended for low temperatures; the absence of a letter indicates that it belongs to the summer season.
7. You should consult with a specialist in a store or service station if you have doubts about the choice of gear oil.