Sales on the market at present in our country of engine oil specification/brand has two code: code and viscosity grade quality level. In order to in line with international standards, China's current national standard for used engine oil oil (gas) and GB11122 GB11121-2006-2006 (diesel oil) refer to the American petroleum institute (API) quality grade and level of the American society of automotive engineers (SAE) viscosity:
1. (API) quality level:
Gasoline engine oil: SA, SB, SD, SC, SE, SF, SG, SH, SJ, SL, SM; Diesel engine oil: CA, CB, CC, CD, CE, CF, CH, CG, CF - 4-4-4, CI - 4; Respectively to oil to prevent oxidation, abrasion resistance, to curb emissions, save fuel and other aspects of the comprehensive performance, from left to right, the higher the grade, the better the performance.
The latest national standards in China, GB11122 GB11121-2006-2006 is cancelled is equivalent to the American petroleum institute (API) quality grades of SA, SB, SC, SD, CA, CB, CG - 4 quality levels.
2. (SAE) viscosity level:
0 w, 5 w and 10 w, 15 w, 20 w, 25 w, 20, 30, 40, 50, used for engine oil viscosity, the greater the value, the greater the viscosity; Used for the winter low temperature oil with W, 5 W / 50, 10 W / 30, 15 W / 40, said many viscosity grade of oil, hereinafter referred to as "multistage oil", multistage oil has good low temperature fluidity, under the condition of high temperature and has a certain viscosity, suitable.
3. The brand meaning:
Brand is in addition to API, SAE, the most characteristic aspect, indicates that a product contains technical content, quality assurance, in the practical performance and related services.
