What does 0w40 mean for engine oil?

1 Answers
CollinLee
07/29/25 3:56pm
0W40 is the SAE viscosity grade of engine oil, where 0W indicates the oil can be used at temperatures as low as -35 degrees Celsius, and 40 represents the kinematic viscosity standard at 100 degrees Celsius. Below is some information about engine oil: 1. Types: Engine oil is divided into three categories: full synthetic oil, semi-synthetic oil, and mineral oil. 2. Oil grades: The packaging of engine oil typically displays codes like 5w30, 0w20, 5w40, etc., which indicate the oil's grade. The 'W' stands for 'Winter,' meaning the oil can be used in winter conditions if it has the letter 'W' in its grade.
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