What is the difference between 5W-30 and 10W-40 engine oil?

1 Answers
ODeclan
07/29/25 5:19pm
The differences between 5W-30 and 10W-40 engine oil are: 1. Different applicable low-temperature environments: 5W-30 is suitable for temperatures as low as -30°C; 10W-40 is suitable for temperatures as low as -25°C. 2. Different applicable high-temperature environments: 5W-30 is suitable for temperatures up to 30°C; 10W-40 is suitable for temperatures up to 40°C. Engine oil, also known as lubricating oil, primarily functions to lubricate, clean, dissipate heat, prevent corrosion, and seal. It is often referred to as the 'blood' of the engine. If the oil quality does not meet standards or the viscosity grade is unsuitable, it can affect engine performance and even cause engine damage. Therefore, when selecting lubricating oil, it is essential to consider the vehicle's operating conditions.
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