What does 0w20 mean for engine oil?

1 Answers
DelEvangeline
07/30/25 12:29am
The meaning of 0w20 for engine oil is: 1. The letter 'w' stands for winter, indicating all-season oil; 2. The number before 'w' represents the viscosity of the oil at low temperatures, with a smaller number indicating better low-temperature fluidity; 3. The number after 'w' represents the standard kinematic viscosity at 100 degrees Celsius, categorized into 20, 30, 40, 50, and 60, with the viscosity standard affecting the oil's adhesion performance at high temperatures. The functions of engine oil include: 1. Lubricating pistons and cylinders to prevent part wear; 2. Assisting the radiator in cooling the engine; 3. Flushing out dirt produced by the engine; 4. Absorbing harmful substances on part surfaces to prevent rust and corrosion.
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