How to read the oil model comparison table?

1, 0w-20, 5w-20, 10w-20, 15w-20, the smaller the number before w, the better the fluidity and quality of low-temperature flow du.

2, 5W-20, 5W-30, 5W-40, the greater the number behind, the better the high temperature viscosity and the better the oil quality.

3. The farther the letters after South Africa, SB, SC, SD, SE, SF, SG, SH, SI, SJ, SK, SL, SM and SN .s go, the higher the oil grade and the better the quality.

Extended data:

API engine oils are divided into two categories:

The series starting with 1 and "s" represent gasoline engine oil, and the specifications are: API SA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM and SN.

2. The series starting with "C" stands for diesel engine oil, and the specifications are: API CA, CB, CC, CD, CE, CF, CF-2, CF-4, CG-4, CH-4 and CI-4. When the letters "S" and "C" exist at the same time, it means that this oil is a common type of gasoline and diesel.

Baidu encyclopedia-engine oil label