What is the difference between 0w and 5w?
1 Answers
The difference between 0w and 5w lies in their low-temperature applicability: 0w can be used in environments as cold as -35 degrees Celsius, while 5w is suitable for temperatures down to -30 degrees Celsius. The number preceding the 'w' in engine oil indicates its flow viscosity under low-temperature conditions. A smaller number signifies better low-temperature fluidity of the oil, which translates to superior engine protection during cold starts. The functions of engine oil include: 1. Alleviating friction and high temperatures; 2. Reducing gas leakage and preventing contamination from external pollutants; 3. Shielding components from contact with water, air, and harmful acidic gases; 4. Cushioning the pressure rise in engine cylinder ports; 5. Flushing away dirt generated on the working surfaces of components.