What is the meaning of engine oil codes?

1 Answers
DeZoe
07/24/25 9:22pm
The meaning of engine oil codes is as follows: Take SAE20W50 as an example, it represents the viscosity of the engine oil. SAE is the abbreviation for the Society of Automotive Engineers, which currently sets the viscosity grades for engine oils. 20W indicates the low-temperature performance of the oil, while 50 represents its high-temperature performance. The low-temperature grades are divided into six levels: 0W, 5W, 10W, 15W, 20W, and 25W. The smaller the number, the better the oil performs in low temperatures. The high-temperature grades are divided into five levels: 20, 30, 40, 50, and 60. The larger the number, the higher the viscosity of the oil at high temperatures.
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