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

1 Answers

Chiron

07/29/25 2:37pm

The grade number after the engine oil classification indicates its viscosity specification. The smaller the number before 'W', the better the low-temperature fluidity of the engine oil. The following are the differences between 10W and 5W engine oil: Different low-temperature viscosity; 10W engine oil: 10W engine oil has poorer low-temperature viscosity compared to 5W, with worse low-temperature fluidity and a higher applicable minimum temperature. 5W engine oil: 5W engine oil has better low-temperature viscosity compared to 10W, with better low-temperature fluidity and a lower applicable minimum temperature. Different applicable maximum temperatures; 10W engine oil: 10W engine oil has a higher applicable maximum temperature compared to 5W, with a wider applicable temperature range. 5W engine oil: 5W engine oil has a lower applicable maximum temperature compared to 10W, with a narrower applicable temperature range. Different wear reduction effects. 10W engine oil: 10W engine oil provides better wear reduction for parts compared to 5W. 5W engine oil: 5W engine oil provides poorer wear reduction for parts compared to 10W.

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