I. Compton
Qingdao Compton Petrochemical Co., Ltd. (Sino-foreign joint venture) was registered in 1992, mainly engaged in Compton lubricants, and its marketing network covers 3/kloc-0 provinces, municipalities and autonomous regions in China.
Second, free/open source software.
The German Flowserve Petroleum Group was established in 193 1 and its headquarters is in Mannheim, Germany. After more than 70 years of development, it has become the largest professional lubricant manufacturer in the world, specializing in the research, development, production and sales of various automobile oil brands, motorcycle oil, industrial lubricants and special oil.
Third, the total.
Total is one of the four largest petrochemical companies in the world, and it conducts lubricant business in more than 1 10 countries around the world. On May 7, 2003, the company was named Total and its headquarters was in Paris, France.
Fourth, Castrol.
Castrol is a globally recognized lubricant expert and belongs to BP, one of the four largest petrochemical companies in the world. Although most people know us through automobile and motorcycle lubricants, in fact, it also produces other lubricants that have a direct impact on daily life, such as natural gas exploitation, power generation, transportation, construction machinery and vehicles, refrigeration, metalworking, plastics, ships and general industrial lubricants.
Extended data
Shopping tips:
1, see API quality index.
The beginning of "S" stands for gasoline engine oil, and its specifications are: APISA, SB, SC, SD, SE, SF, SG, SH, SJ, SL, SM and SN. From "SA" to "SN", the grade of engine oil will be better than the previous one with each additional letter, and the higher the grade, the highest grade is "SN" at present.
2. Check SAE viscosity index
The meaning of SAE label, SAE is the abbreviation of American Society of Automotive Engineers. The label behind SAE indicates the viscosity value of engine oil, for example, SAE 5W-40, where "W" stands for winter and the number before "W" stands for flowing viscosity at low temperature. The smaller this value is, the better the low-temperature fluidity of the engine oil is, and the better the protection ability of the vehicle to the engine during cold start. The number after "W" is the viscosity of engine oil at 100℃. The higher the numerical value, the higher the viscosity, and the better the protection of the engine at high temperature.