What is the difference between Shell engine oil 5w40 and 5w30?

1 Answers
JeffreyAnn
07/29/25 11:05am
Shell engine oil 5w30 and 5w40 have the following specific differences: 1. Different viscosity: The viscosity of 5W-30 and 5w-40 oils is different, with 40 being higher. This means that 40 has higher fuel consumption. 2. Different low-temperature performance: 5w-30 performs better at low temperatures. Under low-temperature conditions, the viscosity of 5w-30 is significantly better than that of 5w-40. 3. Different high-temperature performance: Under high-temperature conditions, 40 has better stability, so if working under prolonged high temperatures, 40 is better. For example, in summer, but it should be clarified that even in the midsummer at the equator, the high-temperature characteristics of 5w-30 are sufficient.
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