S-class W202 Mercedes

1993-2000 of release

Repair and car operation

W202 Mercedes
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
- 4. Greasing system
   4.2. Specification of engine oil
   4.3. Scope viscosity oils / class
   4.4. Consumption of oil
   4.5. Contour of circulation of oil (DD)
   4.6. Oil reduktsionny valve
   + 4.7. Oil pallet
   4.8. Indicator of level of oil
   4.9. The heat exchanger oil - / cooling liquid
   4.10. Diagnostics of malfunctions in a contour of circulation of oil
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electroschemes

b47c026d b47c026d

4.2. Specification of engine oil


In modern engines use only HD oils is allowed. They represent the alloyed oils which lubricant properties are considerably improved at the expense of an additive of various chemical biocatalysts. These additives improve protection against corrosion, reduce oxidation, in particular, formation of a deposit in an engine case, is improved by viscosity of oils and their dissolving properties. Clearing and dissolving additives not only reduce formation of deposits in the engine, but also dissolve these deposits, make small all other mechanical impurity in engine oil and support them in a suspension so they leave at oil replacement.

Quality of HD engine oils is estimated according to API system (to API – the American institute of oil). The European manufacturers also are guided by this system.

Oils are designated by two letters. The first letter in designation – a scope: S–service, it is suitable for carburetor engines; With – commercial, is suitable for diesel engines. The second letter means quality in alphabetical order. The highest quality according to the API specification: SG – for petrol engines and CF – for diesel.


Engine oils which are marked by the manufacturer as oils for diesel engines, are unsuitable for the petrol. There are such oils which are suitable both for petrol, and for diesel engines. In this case on container for oil both specifications (for example, by SG/CE) are designated.