What does SN in motor oil represent?
1 Answers
SN in motor oil represents the highest grade of oil. Here are the relevant details about motor oil: 1. Classification method: Motor oil grades are represented by a combination of two letters. The S series represents oil for gasoline engines, with specifications ranging from SA to SN. Each subsequent letter indicates better performance than the previous one, with letters further down the alphabet representing higher quality grades. 2. Functions: (1) Lubrication: Reduces friction, minimizes wear, and prevents metal sintering under various conditions. (2) Low-temperature operability: Ensures easy starting and reliable oil supply in low-temperature conditions. (3) Viscosity-temperature characteristics: The property of lubricating oil to change viscosity with temperature variations.