Gear Oil 80W90

80W-90 gear oil is designed for transmissions and drive axles that require an API GL-4 grade lubricant.

Properties and functions

80W-90 gear oil is multigrade as it is made from premium mineral fluids. The use of this transmission fluid, thanks to the use of a number of additives, provides easy shifting, and also protects gears and bearings from wear.

The main functions of gear oil 80w90:

• elimination of noise and vibration
• corrosion protection
• heat dissipation
• removal of wear products from friction zones

Viscosity-temperature indicators in the SAE classification

According to the viscosity class, SAE 80W90 transmission fluid belongs to all-weather mixtures. According to the SAE International Viscosity Classification, transmission fluids are divided into 7 classes: four winter (W) and three summer. Fluid is dual labeled if it is intended for all weather. For example, SAE 80W-90, SAE 75W-90, etc. In our case, 80W-90:

• for different models, viscosity characteristics are 14 - 140 mm2 / s, depending on the temperature 40-100 ° C;
• the pour point of the liquid is usually -30, and the flash point is +180 ° Celsius;
• withstands low temperatures;
• viscosity 98, density 0,89 g/cm3 (at 15°).

What does the abbreviation SAE 80W90 mean?

Gear lubricant 80w90 is a universal semi-synthetic.

Based on the properties of the petroleum product, 80w90 transmission fluid is designed to solve the following problems:

• transfers heat energy from adjacent parts;
• prevents damage to the elements due to the formation of a strong lubricating film between them;
• reduces efficiency losses due to friction;
• protects against corrosion;
• reduces vibration, noise and stress on gears.

Decoding 80W90

80 - lower temperature threshold -26 degrees Celsius;

90 - the highest temperature threshold of +35 degrees Celsius.

The dependence of the viscosity of oils on temperature

An indicator of 80W indicates that this mixture is intended for use at any time of the year. The number "80" is an indicator of viscosity, and the higher it is, the more fluid the liquid is at low temperatures. The second digit is "90", this value determines the maximum allowable threshold at positive temperatures.

However, this meaning should not be taken literally. You just need to know that this figure indicates the possibility of operating this type of mixture in the summer at a maximum allowable temperature of + 35 ° C (this information is in the reference literature on transmission fluids).

Gear oils have good viscosity, the main quality indicator common to all fluids. The mixture used depends on the design, operating mode and degree of wear, ambient temperature and other factors. It cannot be unequivocally said that if the viscosity of the liquid is high, then it is better, since at low temperatures a liquid with a high viscosity will slow down the contacting parts. And a liquid with low viscosity at high air temperature has poor enveloping ability, as well as worse protective properties.

Gear oil 80w90: specifications

Different manufacturers and brands of transmission fluids differ in their technical characteristics. Each manufacturer of Russian-made mixtures can use their own additives in the development of oil products.

It should be noted that the all-weather mixture is not quite the correct name. For example, liquids (75w80 and 75w90) can be used at temperatures from -40 to +35. The most resistant to high temperatures, 85w90, can be poured at temperatures from -12 to +40. For moderate weather conditions, 80w90 fluid will be all-weather.

Key Benefits of 80W-90 Gear Oils:

• High viscosity grade provides excellent oil film stability at elevated temperatures and significantly reduces driving noise;
• High lubricity significantly reduces friction of internal elements;
• liquid withstands very high loads and pressures;
• Increases anti-corrosion properties, prevents wear and almost does not foam;
• Does not show aggression to non-ferrous metals.

The choice of transmission fluids is quite wide. We will now consider the most common ones.

Mobilube GX 80W-90 is an automatic transmission fluid formulated from high quality petroleum derivatives with advanced additives. The level of protection corresponds to API GL-4.

The main features of this product:

• stable at high temperature fluctuations, since the composition uses components that prevent the oxidation of organic matter at high temperatures;
• slip prevention with maximum heating;
• prevention of wear of parts under maximum loads and friction;
• protects metal from corrosion;
• Matches perfectly with almost all seals, gaskets, etc.

Inquiry:

• final drives, high load axles where API GL-5 protection is required;
• various vehicles, from cars to trucks;
• public use equipment: agricultural, harvesting, construction, etc.;

Mobilube GX 80W-90 Gear Oil

Castrol Axle EPX 80W90 GL-5 is considered one of the first transmission blends for agricultural machinery and SUVs. Its peculiarity is that it is specially designed to operate under high loads and maximum temperatures in order to guarantee uninterrupted operation of the engine in difficult situations. When used for its intended purpose, complies with API GL5 standards.

The main advantages:

• special development for especially difficult working conditions;
• high resistance to thermal oxidation;
• viscosity and lubricity at the highest level;

Cons:

somewhat limited in application, as it is specially designed for difficult working conditions

Castrol EPX 80W90 GL-5 Bridge

Lukoil 80W90 TM-4 is an excellent combination of simplicity and efficiency, as it can be used for both cars and small trucks. In addition, it deserves a separate positive review for its long service life and resistance to low temperatures, all due to additional initial impurities.

The main advantages:

• basic, but time-tested composition;
• guarantee of operation in a wide temperature range;
• cheapness;
• good anti-corrosion and lubricating properties;

Cons:

• designed for API GL5 only.