How to Understand Motor Oil Grades?
1 Answers
Understanding motor oil grades involves looking at the initial letters. Below are specific methods to distinguish motor oil grades: 1. S: The S-series represents oil for gasoline engines. The specifications generally range from SA to SN (in alphabetical order). With each subsequent letter, the oil's performance improves over the previous one, containing more additives to protect the engine. The further the letter is in the alphabet, the higher the quality grade. Most international brands offer oil grades above SF. 2. C: The C-series represents oil for diesel engines. 3. Coexistence: If both S and C letters are present, it indicates that the oil is suitable for both gasoline and diesel engines.