A drivetrain is the integrity of the mechanisms that transmit engine torque to the wheels so that the vehicle can drive. Also, thanks to the transmission, the car changes the traction force, can change the speed and direction of movement.
Periodic jamming of the gearbox and the inability to switch speeds indicates that the transmission units are not in order. In these cases, it is not always necessary to replace the unit itself, sometimes it is enough to prevent and replace the transmission fluid, namely the oil. On average, gear oil changes are made after 50,000 km.
Before pouring transmission oil into the car, you need to familiarize yourself with the parameters and characteristics of the protective fluid. Similar information is written by the car manufacturer in service book on the operation of the machine.
Transmission oils are universal, all-season, summer, winter, for cars with front and rear wheel drive, small freight transport, jeeps and for heavy equipment coupled with city vehicles. Actually, you can already see that their classification is similar to engine oils, however, they also have a gradation according to SAE.
In the world it is customary to call such oils Gear Oil, which literally means gear oil.
Functionality of transmission oils:
- heat removal from surfaces rubbing against each other;
- prevention of wear of rubbing surfaces of parts, through the formation of a protective oil film;
- neutralize wear products from friction zones;
- reduce frictional losses in mechanisms with gear clutches;
- prevent corrosion of car units;
- to nullify noise, vibration and loads on gear mechanisms by filling the gaps between them.
Properties of transmission oils:
- Anti-corrosion;
- Anti-foaming;
- Anti-seize;
- Antiwear;
- Saving rubber elements of cars in relation to non-ferrous metals;
- Resistance to thermal oxidation;
- Non toxicity;
- Resistant to temperature changes without loss of viscosity.
As an illustrative example, consider 80w90 gear oil, which is used most in demand from the consumer. As we said above, transmission oils, like engine oils, are subject to SAE classification. In the international community, such oils are usually equated to the J306 SAE standard. This is the main indicator of the viscosity of TM, which is based on the temperature properties of the oil (low and high temperatures). SAE engine oils are labeled with an interval of 0 - 60, for transmissions - 70 - 250.
Good quality gear oil works in any conditions, the higher its viscosity, the more reliable and durable the protective film for the units. Gear oils with a lower viscosity have greater fluidity, they are better able to withstand low temperatures, but at the same time their protective capabilities are significantly reduced. Ideally find the golden mean so that the fluidity is good and the oil quickly fills all microcracks and the protection film is thick and reliable enough. For this, modern gear oils are equipped with additives, by analogy with engine oils. The property of acting as a sealant is obtained even during production, before the addition of additive packages.
After adding additives, TM fluids are divided into categories: non-thickened and thickened.
How to decode 80w90 gear oil?
This fluid for 80w90 transmissions is deciphered as follows:
- Letter W - winter(example 80W) - does not lose its properties at a temperature of -26 degrees Celsius, while maintaining good fluidity.
- 90 - summer- the oil is not exposed to overheating at a climatic temperature of + 35 degrees Celsius. This should not be confused with motor oils, which work in the engine and are less dependent on ambient temperatures.
- 80W90- multigrade (combined) transmission oil, therefore there is a double marking.
Ideal working conditions for 80w90 gear oil are -26 to +35 degrees.
Reference! As in any combinatorial theory, there are no ideals in combi-TM, therefore, speaking of all-seasonality, it should be borne in mind that there are limit points for climatic temperatures. For example, the most frost-resistant oils among all-weather oils are 75w80 and 75w90 - their limit is from -40 to +35, and the most heat-resistant 85w90 with an interval from -12 to +40.
80w90 specifications
Despite the fact that 80w90 gear oil is produced different manufacturers, their characteristics are uniform. Only the additive packages that each manufacturer adds at its discretion can differ, in any case adhering to world standards, since otherwise the TM will not pass certification.
- SAE viscosity classification - 80w90;
- density 0.9 kg / m3 at +15 degrees Celsius;
- coefficient of kinematic viscosity from 14 to 19 cSt at working +40, it all depends on the package of additives used;
- viscosity can change from 98 to 142, again due to the additive package;
- the limiting temperature for minus in the gearbox is from -16 to -30;
- flash point from 179 to 230.
Each manufacturer writes information on all the characteristics of 80w90 transmission oil on the package. As in engine oils the front label contains the main parameters of 80w90; TM - 4 80w90; TM - 4 SAE 80w90 or SAE 80w90. Domestic manufacturers also use the SAE abbreviation, indicating that the product belongs to the world classification and has been certified.
80w90 reviews - what do car owners say?
| Guest 1. I have a new Priorka, so I immediately came to Lukoil. At the factory, they were filled, although there is no such oil on sale, these are purely factory wisdom, and so right now at TM - 4, while everything is fine, the machine does not puff, the machine does not groan. There Lukoil writes on the transmission 80w90, one for front wheel drive, the second for the backside, there are also generalists, but it's better to take it for yourself. Semi-synthetics need to be taken, there is a good ratio of synthetics and mineral water. |
| Guest 2. I have been riding the mineral TM since my birthday, I don’t know grief. In winter we start, in summer we don't fry, the box does not jam, the bottom does not ring. The song is not a typewriter. By the way, I switched to Lukoil from TNK, there are no problems there either. Honey, not butter, so succumbed to the general excitement. Probably I'll go back to TNK, there are a lot of fakes in Lukoil. By the way, recently the vote was on the official website "Behind the Wheel", so I voted for the transmission mineral oil Lukoil 80w90, and it was not a shame, is driven by a domestic manufacturer. |
| Guest 3. And I, too, for Lukoil 80w90, my husband taught me to drive a six, so we poured TNK, he said that it was excellent oil. He showed me the characteristics, as it was written there - transmission oil TNK 80w90 starts up without problems at -38. Actually, even at minus 35 it started up, we have such frosts constantly. It’s a pity to leave him, he gave me Kalinka, so TNK doesn’t fit, we tried imported mineral water, but it’s expensive, but he still wants Priorka, so we’ll definitely go to Lukoilovskaya semisitnetics. We are for the domestic manufacturer, we support it, so to speak. |
| Guest 4. Now I have filled in ZIC 80w90 gear oil, everyone haunts it on anything, but I like it. The car already sighed, as if the box was jamming all the time, but right now, like clockwork. |
| Guest 5. ZIC 80w90 is just that, but I still don't recommend Lukoil to anyone. |
| Guest 6. Excellent oil Lukoil and everything coincides with what is written on the canister. We changed it, 35 thousand have already been rolled, so in general everything is fine - an ideal defense. But I myself read about the ZIC on the internet, everyone hates it, whether it is engine oils or a transmission. |
| Guest 7. The box used to jam, - multitronic, immediately thought about the oil, it turned out that the case was in the box itself, it was time to repair it. Not cheap, of course. After the zik I went to the liquimolli, and then I felt sorry for the money, I decided to try the zik again, especially since the seller gave his head to cut off, that his own oil. Now I say for sure, for modern cars and automatic gearboxes, ZIC 80w90 transmission oil is SUPER. At the expense of backdrops, I can not say, I did not go to these. |
| Guest 8. I have a rear-wheel drive, in addition to the four, there is also a Volga 21, it flies like new and without forced engines. So here's for us, for rear-wheel drive the most ideal is TNK 80w90 gear oil. And the additives there are normal, and there are no fakes, who needs it, and the quality is decent. Lukoil is nothing, but their mineral water is expensive, and semi-synthetics are not needed for backdrops, and Volga is even contraindicated. TNK itself, and quality and money a little. |
Judging by the reviews of car owners, everyone makes their own choice. Despite the existing negative reviews about Lukoil, many still choose it, when choosing it, you just need to better check and not get caught for a fake. Also popular ZIC oils and TNK 80w90.
What is 80w90 gear oil, the characteristics and properties of this oil product - these questions are of interest to many motorists. Any happy vehicle owner will sooner or later encounter certain technical requirements to your car. These requirements include the choice of transmission oil. What it is and why it is needed, we will consider, taking as an example the multigrade oil 80w90, and also determine the functions and properties of such oils in general. Any car has a transmission - a set of mechanisms designed to transfer torque from the engine to the wheels, to change the tractive effort, speed and direction of movement, thereby ensuring the movement of transport and the ability to control it. This entire system is subject to wear, overheating, corrosion and other negative factors. To ensure the performance of all mechanisms, transmission oils are used. The correct operation of the entire car depends on their quality and compliance with a specific type of gearbox, which is part of the transmission.
In any car there is a transmission, in order to ensure the operability of all mechanisms, transmission oils are used.
Functions and properties
Gear oil (international name Gear Oil, literally translated as gear oil) to maintain the working condition of the mechanisms must perform certain functions:
- carry out heat removal from surfaces subject to friction;
- prevent wear of rubbing parts by forming a stable oil film between them;
- remove wear products from the connection zones where friction of parts occurs;
- reduce losses due to friction in gear couplings;
- protect parts from corrosive processes;
- By filling the gaps between mating surfaces, significantly reduce such indicators as vibration, noise and load on the gears.
Rather stringent requirements are set for such oils, since their mode of operation is quite extreme: great pressure, high speed slip and wide temperature coverage.
When evaluated, they must be endowed with a certain set of properties. The main ones are:
- anti-corrosion properties;
- antifoam - resistance to oil foaming during the working process and the formation of an air-oil mixture, which inevitably leads to corrosive processes;
- antiwear and extreme pressure;
- not aggressive towards non-ferrous metals and rubber seals of structures;
- thermo-oxidative stability - long-term invariability in the working process and during storage;
- low toxicity;
- good viscosity-temperature properties provide the desired quality of lubrication of parts, taking into account a wide range of temperatures - from very low to maximum high.
Such consumable, like 80w90 oil, contains additives that contribute to thickening, that is, it belongs to thickened liquids.
Back to the table of contents
Viscosity-temperature properties in the SAE classification
In the international SAE (American Society of Engineers) viscosity classification, there is the SAE J306 standard. It dictates the viscosity performance requirements for transmission oils and is based on low and high temperature performance in terms of SAE viscosity. Gear oils are different from engine oils. Therefore, so that, focusing on viscosity, there is no confusion when choosing an oil, they differ in marking for the same viscosity. Engine oils are nominally labeled from 0 to 60, and for transmission oils, the designations are from 70 to 250. Quality oil It has a good lubricating ability, which directly determines how successfully the surfaces of parts will be protected from friction and various kinds of damage. The higher the viscosity, the better the lubricating ability. The high viscosity is due to the high strength of the lubricating film.
Oil with a lower viscosity level tolerates low temperatures much better, without taking time to warm up the machine. But at the same time, the lubricating ability decreases, and with them many useful properties of the oil. Also, a thinner oil has a much higher penetrating ability, it finds microcracks faster and flows out of the box. Of course, in modern technology, to prevent this, highly effective sealing means are used even at the stage of its production. But over time, they can also leak. In order to balance these indicators, to find a kind of golden mean, special sets of additives are used. Depending on the application of the additives, transmission fluids are thickened and non-thickened.
With regard to viscosity, the oil is selected taking into account the maximum and minimum possible temperatures environment in which vehicles are operated. Thus, there is a division of oils into conditional series:
- With the letter "w" (decoding winter) - winter row for example oil 80w.
- The summer series is simply denoted by a number, for example, 90.
- All-season or combined. They are marked with double markings, such as for 80w90 oil.
Many people know that all-seasons are produced with double marking, but not everyone knows what the decoding of this designation is.
Back to the table of contents
Deciphering the SAE 80w90 marking
We look at the container, we see the double marking SAE 80w90. The oil is all-season, which means that it has two viscosity characteristics: 80w and 90. The winter indicator of 80w indicates that the liquid retains its fluidity when low temperatures down to -26 ° C. In relation to the summer indicator 90, the maximum operating ambient temperature is 35 ° C. Transmission oil 80w90, the characteristics of which we will consider below, has a temperature range from -26 ° C to 35 ° C. I would like to emphasize that you should not be fooled by the name all-season, this is not a very correct definition. So, for example, the lowest temperature among the combined oils (75w80 and 75w90) have a range from -40 to 35 ° C. And the most heat-resistant among them 85w90 - with limits from -12 to 40 ° C.
For those who live in these temperature limits, it is really all-season, but Russia is large, and residents of the northern regions, where frosts exceed 40, it is still better to choose from winter oils... For example, 70w, designed for freezing temperatures down to -55 ° C.
Mineral gear oil 80W-90 is universal and is used in different types technology. The material is characterized by resistance to low and high temperatures, stability under increased loads. The grease contains special thickeners that ensure efficient operation of the gearbox in various conditions.
Explanation of designation
Oil marking 80W-90 meets the requirements of the international system SAE classification(Society of Automotive Engineers), developed by the American Society of Automotive Engineers. The system divides lubricants into several categories according to their viscosity: winter, summer, all-season.
In the 80W-90 marking, the letter W stands for "winter", that is, the oil refers to winter. Number 80 shows the value of the viscosity of the material at the lower permissible temperature limit, at -20 ° C.
The second number - 90 - indicates the possibility of using the grease in summer period... A high viscosity value allows you to start the motor at temperatures above +5 ° C and effectively lubricate the rubbing surfaces. The material is used in the temperature range up to +40 ° С.
The combined designation - 80W-90 - classifies the oil as multigrade. It performs its functions equally well both in warm and cold seasons. The operating temperature range is from -20 to +40 ° С.
Gear oil functions
- Removal of excess heat from the rubbing surfaces of the gearbox.
- Education protective film that prevents surface wear.
- Protection of metal elements against corrosion.
- Dissolving deposits.
- Reducing vibration and noise during gearbox operation.
Applications
80W-90 oil is used for lubrication internal parts heavy-duty mechanical transmissions with gears any type, including hypoid. It is used in transfer cases, drive axles, differentials, steering gears on cars and trucks with a classic layout. The material is used in four-wheel drive vehicles and some front-wheel drive vehicles. The use of the grease is recommended in regions with a sharply continental and hot climate, as well as in high mountains. It is allowed to operate in the driving axles of BelAZ dump trucks with a carrying capacity of up to 90 tons in a warm temperate climate.
Gear oil 80W-90 is not recommended for use in manual transmissions with synchronizers made of non-ferrous alloys. Some brands of front-wheel drive cars also do not require such a lubricant, since the gears in the mechanism are mostly cylindrical and the risk of scoring is minimal. No need for transmission oil automatic boxes gear shifting. For their maintenance, a special low-viscosity ATF liquid is used.
Technical characteristics of oil 80W-90
The technical characteristics of transmission oil vary widely, it all depends on the additive package used. Precise values for lubrication specific brand indicated on the packaging.
| Typical characteristics | SintecTranceGL-4 SAE 80W-90 | Sintec TM5-18 GL-5 SAE 80W-90 |
| Density at 15 ° С, g / cm³ | 0,8885 | 0,8917 |
| Kinematic viscosity at 40 ° С, mm² / s | 137,3 | 148,4 |
| Kinematic viscosity at 100 ° С, mm² / s | 14,48 | 14,69 |
| Viscosity index | 104 | 98 |
| Flash point in an open crucible, ° С | 231 | 226 |
| Dynamic viscosity at -26 ° C, mPa s | 147400 | 115200 |
| Pour point, ° С | -28 | -26 |
| Tolerances | - | Fuso KAMAZ Trucks Rus MAZ OJSC |
| Compliance with specifications | API GL-4 | API GL-5, MAN 342M-2 (160,000 km drain), ZF TE-ML 05A, 12E, 16B, 17B, 19B, 21A |
Benefits of 80W-90 oil
- High degree of protection of metal elements against corrosion.
- Resistance to foaming.
- Protection against scoring and premature wear at low speed / high torque.
- Thermal oxidative stability.
- Compliance with leading standards.
- Chemically inert to stuffing box and seal materials.
- Maintaining stable properties over a wide temperature range.
Safety requirements
When using the oil strictly according to the intended purpose and following the manufacturer's recommendations, the material is safe for human health. When handling the liquid, it is recommended to use gloves, safety glasses. Avoid skin and eye contact with oil. After finishing work, wash your hands with soap and water.
Transmission oil is based on petroleum products and is therefore flammable. During storage, the packaging must be protected from heating, direct sunlight. The use of open flames in the immediate vicinity of the lubricant is prohibited.
Environmental Protection
Residues of fresh oil and waste product are disposed of in accordance with the current legislation of the Russian Federation. The grease is collected in a sealed container and transferred to a collection point. It is forbidden to drain oil onto the ground, into a body of water, storm or domestic sewer.
Where to buy oil 80W-90
Obninskorgsintez is a full-cycle enterprise. For more than 15 years we have been producing high quality gear oils that meet Russian and European standards. The control over the characteristics of materials is carried out by the company's own testing laboratory. This allows us to carefully check the recipe and constantly improve the products.
We offer businesses and organizations profitable terms cooperation:
- complex supplies of lubricants to any region of the Russian Federation;
- a complete set of certificates and accompanying documents for each shipment;
- comprehensive support of the company's partners in all cities;
- detailed advice on the assortment and assistance in choosing products, taking into account the current needs of your business;
- favorable prices from the manufacturer.
For organizing the supply of gear oil, call us at the number indicated on the website. You can purchase materials at retail from our partners, the addresses of the points of sale are indicated in the section "".
Sooner or later, all car owners have to deal with a gear oil change. In general, this is not a difficult procedure and you can do it yourself. The most important thing is to choose the right fluid. Transmission oil 80w90 is one of the most popular types of materials for manual transmissions, transfer cases and other components.
Functions of transmission oils
Transmission is a set of elements, the main purpose of which is to transfer torque from the engine to the wheels, change the tractive effort, speed and direction of movement. This system subject to corrosion, overheating, wear and other negative factors. Therefore, to ensure the continuous operation of the transmission, it is necessary to use special oils... At the same time, the performance of the entire car depends on the quality of these fluids and their compliance with a certain type of gearbox.
Any gear oil must fulfill the following functions:
- Remove heat from interacting transmission elements
- Prevent surface wear
- Remove wear products from friction zones
- Reduce friction losses
- Protect transmission elements from corrosion
- Reduce stress, noise and vibration with gear
In addition, the working fluid must have a certain set of properties:
- Anti-corrosion
- Antifoam
- Anti-seize
- Antiwear
- Compatible with non-ferrous metals and rubber seals
- Oxidation stability
- Low toxicity
These requirements are due operational features transmissions. During operation, the oil temperature can reach up to +140 ... + 160 ° C, and in friction zones - over +200 ° C.
When driving for a long time, the temperature working fluid remains high, so foaming can occur. As a result, the oil loses its performance and does not lubricate the surfaces.
With an aggressive driving style, off-road driving, slipping, the loads on the checkpoint are very high. In such conditions, wear, friction increases and there is a great risk that the transmission gears will collapse.
SAE transmission oil properties
The Society of American Engineers has developed an international classification of oils by viscosity - SAE. It contains the SAE J306 standard, which indicates certain requirements for the viscosity of transmission oils. It is based on the high and low temperature properties of the fluid and is expressed in terms of the SAE viscosity grade.
Gear oils and engine oils are different from each other, so to avoid any confusion when choosing a fluid, there are different markings for products with the same viscosity. Engine oils are labeled from 0 to 60, transmission oils are labeled from 70 to 250.
A high-quality transmission fluid has good lubricating ability, which determines the degree of protection of the working elements of the transmission from friction, wear and other damage. The higher the viscosity index, the higher the lubricity and strength of the oil protective film.
Low viscosity oils perform much better at low temperatures, but have weaker lubricating properties. In addition, liquid materials are highly penetrating, so they quickly penetrate into various cracks and can begin to flow out of nodes. And, even despite the fact that even at the production stage, effective sealants are laid over time and they can allow oil to leak.
To balance all these indicators, manufacturers of transmission fluids use special additive packages, depending on which lubricant can be thickened and not thickened.
In terms of viscosity, the choice of oil should be carried out in accordance with the ambient temperature at which the car is operating. There are 3 main categories of oils depending on temperature conditions:
- Winter oils (indicated by the letter "W", for example, 80W)
- Summer oils(denoted by a two-digit number, for example 90)
- Multigrade oils (double-labeled, e.g. 80w 90)
In addition, transmission oils are classified according to performance parameters. According to the API, they are designated as GL-1, GL-2, GL-3, GL-4, GL-5, GL-6. Each of the groups meets certain operating conditions in specific types of transmission.
Decoding of marking 80W-90
Each transmission oil has an SAE mark on the label. Transmission oil 80W-90 decoding is as follows.
A winter reading of 80W denotes the low temperature properties of the oil. It denotes the lower limit of external temperatures at which the fluid will work - down to -26 ° C. A summer reading of 90 denotes the high temperature properties of the oil. It denotes the upper limit of the ambient temperature at which the liquid can be used - up to +35 ° C.
Thus, 80W90 oil can be used in the temperature range from -26 ° C to +35 ° C.
For regions where average seasonal temperatures are kept within the indicated values, this oil is ideal. But for applications in the southern or northern latitudes, it is better to choose seasonal transmission fluids.
Technical characteristics of oils 80W-90
80W90 oil is manufactured by various companies, and there are more different fluids on the market today. They differ in cost and in technical characteristics, but the latter do not particularly affect the use of the material. The thing is that manufacturers use various additives, but in general, relative to the standards, the characteristics of the oils are approximately the same:
- SAE viscosity grade 80W90
- Density 0.9 kg / m3 at 15 ° C
- Kinematic viscosity at 40 ° C 137 to 144 cSt
- Viscosity index 120
- Pour point -16 ° C to -30 ° C
- Flash point +179 ° C to +230 ° C
Transmission fluid 80W-90 is quite popular with car owners. It works great at low and high temperatures, as well as under increased loads.
Examples of products
The range of oils with a viscosity of 80W-90 is quite extensive. Today, every car owner can choose an oil that attracts him in cost and is suitable in terms of characteristics. Let's consider the most popular products.
It is a multigrade gear oil with a multifunctional additive package. It is intended for mechanical transmissions of passenger cars and trucks, vans, buses, various special equipment and ships.
The fluid has excellent extreme pressure, antioxidant and viscosity-temperature properties. It is specially designed for hypoid gears and units that operate under heavy loads and harsh conditions, as well as with recommendations for the use of GL-5 oils.
The oil possesses high thermal-oxidative stability, good binding characteristics, high anti-corrosion and antifoam properties, is compatible with sealing materials and prevents premature wear of transmission elements.
Multipurpose synthetic oil class GL-4. It is intended for mechanical transmissions of cars, buses, trucks. Also suitable for use in rear axles passenger cars and light commercial Vehicle.
The fluid contains an effective package of antiwear additives, does not lose its properties when long work in different temperature conditions, does not cause corrosion, is compatible with polymer seals, softens shock loads and vibrations.
Transmission universal oil class GL-5. It is used in differentials, final drives and other units of commercial vehicles and cars. Approved by MAN and ZF for use in commercial vehicles, agricultural and off-road vehicles.
It is resistant to high loads, reliably protects transmission elements that operate in difficult conditions... The oil forms a tough film on the parts that protects them from shock and wear. Due to its good thermal stability, the fluid does not thicken, does not form deposits and extends the life of the entire transmission.
LUKOIL 80W-90
Mineral transmission oil GL-4. It is applied in mechanical transmissions passenger cars, special vehicles and commercial vehicles. Can be used in transfer cases, power take-offs.
The oil is distinguished by a high level of antiwear and extreme pressure properties, protects transmission units at high loads and various temperatures, has high anticorrosive and antifoam properties, and also has excellent thermo-oxidative stability.
Transmission oil 80W90, the characteristics of which we will consider today, can be attributed to the average between the viscosity grades 85W90 and 75W90. Let's find out in more detail what quality characteristics it differs from others.
Thickened and not thickened
They are thickened and not thickened. The latter are sometimes also called one-brand. In the first case, additives are installed that thicken the base. Then the transmission oil is indicated by two numbers: 80W90. The characteristics of single-brand are manifested in the fact that they are manufactured without the addition of thickeners. They are denoted by one number - for example, 80, 90, 140.
Viscosity and temperature conditions
When conducting comparative analysis the viscosity in operation for the two types (samples were taken to compare the viscosity grades of SAE 80W90 and 85W90) was approximately the same. But when working at low temperatures, thickened species become more liquid when compared to non-thickened ones. Therefore, in this indicator, they show themselves better. On the other hand, single-brand greases work more stably in the appropriate and normal for them temperature conditions... And this is also a very important parameter when working, especially in harsh operating conditions.
Transmission oils 80W90 and 85W90 have the same viscosity at operating temperature one hundred degrees. But if you take a minus mark of twenty degrees, then the difference will be many times different.
Sometimes the manufacturers themselves call all thickened types of lubricating fluids all-season. But this is not an entirely correct statement. So, the characteristics will show serviceable at minus 26 ° C, 75W90 - at minus 40 ° C, and 85W90 - only at minus 12 ° C. Thus, for residents of the southern regions, all indicators really turn out to be suitable for year-round use. But for those who live in northern regions, the parameters 85W90, and sometimes 80W90, will be clearly insufficient.
Welding load: foreign and domestic requirements
When comparing lubricants, the main metric to look at is the weld load. It is determined on a conventional 4-ball friction machine. Since transmission oil 80W90, the characteristics of which have a group of API classifications, belongs to the GL 5 group (and it assumes operation in heavily loaded bridges and with the viscosity class 85W90, the result according to the standard should be from 3280 N. The samples under consideration showed from 3283 to 4635 N. quality characteristics of transmission lubricating fluids.
But besides this classification, there is another, domestic one. According to her, the requirements are even more stringent than those in the API abroad and for foreign cars. For example, according to representatives of the AvtoVAZ company, the GL 5 class should produce results of at least 3483 N, and in AZLK, all 3924 N is considered the norm. Therefore, if you focus on domestic producers, then the test results will no longer seem so satisfactory.
Everyone's favorite "Castrol"
You can consider a specific non-thickened Castrol oil. All its indicators, except for viscosity at a certain temperature, will be no worse than thickened lubricating fluids. Moreover, the wider the working range, the more difficult it will be to compare thickened milk with non-thickened milk. For example, if gear oil 80W90 (GL 5 according to API classification) shows good viscosity at the centigrade mark, maintains the load at the proper level, and maintains excellent low-temperature properties, then the non-thickened oil will support the load in the same way as the lubricant SAE class 90, or will have similar low temperature properties to an SAE 80 grade oil.
So, "Castrol" of the EPX80 group showed a result close to the 80W90 under consideration in terms of cold resistance. At the same time, its welding load cannot be called excellent.
However, this result does not mean that non-thickened transmission oil is worse than thickened. This only indicates that it should be operated under more suitable conditions.
What are the optimal characteristics
So, a good quality viscosity characteristic is 150 degrees Celsius and above 5 square millimeters per second. At low temperatures, an excellent viscosity is one that does not increase by more than 150,000 mPa * s. The temperature indicator that will be at this dimension is the limiting one to ensure the normal operation of the transmission. If lubricating fluid will be used at a lower value, it will have a bad effect on automotive mechanisms.
What kind of oil to fill in a manual transmission
Previously, such a question simply did not arise. It was enough just to indicate to the seller that they needed engine or transmission oil. But at present, when store shelves are overflowing with many types of oils, you have to understand their various parameters in order to eventually understand which oil to pour into or automatic.
For example, it is known that GL 4 and GL 5 groups are suitable for passenger cars, and even lower for domestic ones.
But when it comes to viscosity, it is more complicated. For example, if you take transmission oil 80W90 (reviews of motorists in this are similar to the results of independent tests), then they have more cold-resistant characteristics than 85W90 and can easily be used at temperatures from -20 to -25 o C. At the same time, for a transmission viscosity grade 85W90 normal work will be provided only up to minus 12 o C.
Both the oil group and its viscosity are indicated on the canister packaging. Therefore, all that remains for the car enthusiast is simply to figure out the necessary parameters for his car and choose a certain brand of oil.
Lukoil TM 4: transmission oil 80W90, price, characteristics
Having understood the main characteristics, you can move on to certain types of transmission lubricating fluids.
In number the best oils the class in question includes Lukoil 80W90 TM 4 gear oil. This is a simple and inexpensive, but high-quality lubricating fluid that will work perfectly both on passenger cars and on oil-intensive trucks. It is made on a mineral basis. In addition to the base, the grease contains a package of additives that improve its properties. It shows itself well even at very low temperatures and is able to remain in working condition for a long time. Of course, the oil cannot be called elite, but for "workhorses" this transmission is just what you need.
The benefits of the oil are as follows:
- simple and reliable composition;
- large temperature range;
- good work at low temperatures;
- the presence of wear-resistant and other additives that improve quality;
- low price.
API compatibility - GL 4 is the only drawback that this 80W90 gear oil has. The price will seem tempting to many: from 137 rubles per liter. For comparison: TNK TransHypoid 80W90 costs 539 rubles per liter; Motul Gearbox 80W90 - 855 rubles; Ford 80W90 - 1300 rubles.
