Many drivers know that today there are different specifications by which all lubricants are classified.
Most automakers do not have enough generally accepted classifications, so they have developed their own engine oil tolerances for various engines. Often, car owners cannot figure out what the meaning of tolerances is, how they differ from each other.
The oil tolerance is some quality standard that includes indicators determined by the automaker.
Finding tolerances for a car oil is not an easy task. To be able to indicate compatibility with motors of any automaker on a canister, a lubricant manufacturer needs to be certified.
The automaker needs to test the oil product, analyze it in the laboratory. Only after that you can draw up your tolerances for automotive oils.
Data on oil with a tolerance must be indicated on the canister. If they are not, then the engine / transmission oil you are purchasing has not been certified.
Tolerances were introduced due to the rather high competition in the market for new cars. Ford was one of the first to use them. To achieve their own goals, firms test their products very rigorously against a variety of criteria (including compatibility with different brands of motors).Content
Purpose of tolerances
Any car manufacturer uses its own technologies and materials for their production. In view of this, power units, transmissions of various brands of cars also differ from each other.
Motor oils contain additives. Because everyone uses different additives, as a result, it turns out that exactly the same oil products can be optimal for one engine and absolutely not suitable for another.
Every professional knows that there are no good/bad motor oils. They are all different, designed for different internal combustion engines and operating conditions.
Of great importance is the thickness of the film that the oil forms on the parts of the car. If the film thickness becomes greater than the gaps between the parts that are installed by the manufacturer, this will lead to overheating of the pistons and other negative consequences.
If the film is too thin, the grease will burn out very badly.
Almost all automakers create their own standards. For example, you can find VW oil approval. Special tests are carried out, based on the results of which the lubricant is allowed to be used in any car. Approvals are developed in the form of a certificate.
It must be remembered that with a large range of petroleum products on the market today and the design features of various cars, the approval of motor oil is very significant. If it is not there, it is better not to use oil fluid in your vehicle.Might be interesting: Features of engine oil for four-stroke internal combustion engines
Audi, VW, Skoda, Seat specifications
The list of automaker approvals is usually located directly on the label (after data on SAE viscosity, ACEA and API quality classes).
If the manufacturer's specification you need is not on the canister, then the oil is clearly not suitable for you. Oil selection is carried out taking into account various indicators.
To choose a petroleum product wisely, it is advisable to read the operating manual or consult with the car dealership staff of an official representative of the brand of your car.
Getting acquainted with the specifications of Mercedes, there are several key points to note:
In accordance with BMW standards, for cars of all series equipped with gasoline power units, only those motor oils that have successfully passed special tests and are officially approved by the company can be used.
There are also other approvals: DH-1, GM LL A 025 and many others. However, they are not used very often by manufacturers. For any car and internal combustion engine, you must choose an oil fluid that meets certain standards. Otherwise, you may damage your own car.Recommended reading: 0w 20 – decoding, and it will also be interesting: Decoding 0w30
The API specification was developed in 1969. Accordingly, with it, all motor oils are divided into 3 groups:
The API marking consists of two letters. What the first means, you already know. The second letter indicates the quality of the oil product. The further it is in the alphabet, the higher the characteristics of the oily liquid.Recommended reading: API oil classification Read also: API CF
There are the following types of lubricants for gasoline engines: SN, SM, SL, SJ, SH, SG, SF, SE, SD, SC, SB, SA.Might be interesting: The 12 Best Synthetic Motor Oils for 2023
For diesel engines, there are the following types of oil fluids: CJ-4, CI-4 PLUS, CI-4, CH-4, CG-4, CF 2, CF 4, CE, CD-2, CD, CC, CB, CA.
As you can see, the API classification is quite simple. It is enough to look at the marking, for example, SN, to understand which engines this oil can be poured into and what its performance characteristics are.
Motor oils for diesel engines are labeled similarly to lubricants for gasoline engines.
If you still could not figure out the markings, you can always find a table that contains a decoding of the designations of any classifications.
By deciphering it is possible to establish what are the characteristics of the lubricant product, at what temperature it should be used.
It is also necessary to familiarize yourself with the approvals of automakers. They are very important in today's environment, when there are many types of motor lubricants on the market.