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

1Answers
FelicityDella
07/24/2025, 11:52:23 PM

The differences between 5w30 and 5w40 engine oil are: 1. Different viscosity: 5w30 engine oil has lower viscosity; 5w40 engine oil has higher viscosity. 2. Different stability: 5w30 engine oil has poorer stability; 5w40 engine oil has better stability. 3. Different sealing performance: 5w30 engine oil has lower sealing performance; 5w40 engine oil has higher sealing performance. Engine oil, also known as engine lubricant, consists of two parts: base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve the shortcomings of the base oil's performance, making them an important part of lubricating oil.

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