What does SN grade engine oil mean?

1 Answers
MilaRose
07/29/25 11:05pm
SN grade engine oil refers to: in the API quality classification, it belongs to the second-grade gasoline engine oil level. The main functions of engine oil are: 1. Lubrication; 2. Auxiliary cooling; 3. Cleaning; 4. Sealing and leak prevention; 5. Rust and corrosion prevention; 6. Shock absorption; 7. Wear resistance. The method of adding engine oil to a car is: 1. Pull out the oil dipstick, wipe it clean and measure again to check how much oil is missing; 2. Open the oil cap to add oil, close the cap and start the car for a few minutes, let the oil work in the engine for a while, then check the oil dipstick again, and continue adding if the liquid level drops.
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