What is the difference between 10w and 5w engine oil?

1 Answers
LeDerek
07/30/25 5:05am
The difference between 10w and 5w engine oil lies in their applicable minimum temperatures: 10w is suitable for a minimum temperature of -25 degrees Celsius, while 5w can be used at a minimum temperature of -30 degrees Celsius. The parameters of engine oil refer to its grade and viscosity specification. The quality level of engine oil ranges from SA to SN, with each successive letter indicating better performance than the previous one. The functions of engine oil are: 1. To reduce friction and high temperatures; 2. To minimize gas leakage and prevent external contaminants; 3. To prevent contact between water, air, acidic harmful gases, and engine components; 4. To cushion the pressure rise in the engine cylinder ports; 5. To clean dirt generated on the working surfaces of components.
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