ACEA motor oil classification
Committee of European Automobile Manufacturers (ASEA) classifies motor oil according to its quality.
Classes are marked with letters and numbers, for example: AZ.
- A3 - high-quality all-weather oils for use in gasoline engines (stable viscosity);
- В3 - high-quality all-weather oils for use in diesel engines (stable viscosity);
- B4 - high-quality multigrade oils for use in diesel engines with direct injection (stable viscosity);
API engine oil classification
The American Petroleum Institute classifies oil according to a set of service properties.
Each category is designated by two letters, the first of which indicates the engine type S (Service) - gasoline, C (Commercial) - diesel.
The second letter indicates the quality level of the oil. Moreover, the further down the alphabet is the letter designation, the higher the quality of the oil.
For example:
- API SH gasoline engine oil.
- API CD diesel engine oil.
- API SM oil or better is recommended.
The viscosity of the oil is selected depending on the ambient temperature.
The use of oil for gasoline engines depending on the air temperature.
Types and volumes of technical fluids and lubricants
