What does the engine oil grade SN mean?
1 Answers
Engine oil grade SN refers to a high-quality engine oil classification. Engine oil grades include: SG, SJ, SL, SM, etc. The functions of engine oil are: 1. To alleviate friction and high temperatures; 2. To cool and reduce temperature; 3. To clean and remove contaminants; 4. To dampen shocks and vibrations; 5. To prevent rust and corrosion. Engine oil, also known as motor lubricant, is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties, while additives compensate for and improve any deficiencies in the base oil's performance. The method for changing car engine oil is: 1. Use a jack to lift the vehicle, locate the drain plug, and loosen it to drain the oil; 2. After removing the oil filter, place a container beneath it; 3. Replace with a new oil filter and add new engine oil.