What does 0w20 oil mean?
1 Answers
0w20 oil means: w stands for winter, indicating it is for winter use. The 0 before w represents the viscosity at low temperatures. The smaller the number, the better the fluidity at low temperatures and the stronger the cold resistance. 20 refers to the viscosity at 100 degrees Celsius. The larger the number, the higher the viscosity and the stronger the high-temperature resistance. The main functions of engine oil are to reduce friction and wear of moving parts, remove sludge (one of the functions of dispersants) and varnish (cleaners) from the engine. It also neutralizes acids produced from fuel and lubricant oxidation (cleaners), improves the sealing of piston rings, and cools the engine by carrying away heat from moving parts.