API - Gasoline Engine Classification: SD : For the gasoline engines of passenger cars and trucks dating from 1968 to 1970. An SC oil should offer protection against the formation of deposits at high (detergency) and low (dispersion) temperatures. Additional protection is also required against wear and rust.

SE : For the gasoline engines of passenger cars and trucks dating from 1971. The SE oils can replace SC oils. Compared to the preceding category, SC oils offer better resistance to oxidation and the formation of "cold sludge" at low temperatures. The engine is also better protected against rust.

SF : For the gasoline engines of passenger cars and some trucks dating from 1980. SF oils can replace SE and SC oils. SF oils are better than SE oils as concerns resistance to ageing and protection against wear.

SG : For gasoline engines of passenger cars and some trucks dating from 1989. SG oils can replace SF, SG, CC, SE or SE/CC oils. SG oils have better results than SF oils in resisting the formation of deposits, protection against wear and resistance to corrosion.

SH : Same as SG but more stringent test conditions.

SJ : At SH level, but developed in accord with the API certification system following multiple test criteria.