Lubricating oil label is what mean? - bearing knowledge

Generally speaking, the lubricating oil is the label on the American society of automotive engineers ( SAE） Oil viscosity classification. This is a kind of viscosity grade classification, will be used in lubricating oil into the summer high temperature and with the low temperature in winter and summer and winter general all-weather. A breakdown of the lubricating oil for 6 kinds of oil in the winter, summer oil 4 kinds, general oil 16 kinds of winter and summer. 1. Winter oil brands are: 0 W, 5 W and 10 W, 15 W, 20 W, 25 W, W represents Winter Winter symbol ( Winter) Before, W, the smaller the number, the smaller the viscosity at low temperature low temperature fluidity, the better, for the lowest temperature of the lower; 2. Summer oil brands are: 20, 30, 40, 50, the greater the number the greater the viscosity, apply to the highest temperature is higher; 3. Summer and winter gm oil brand respectively: 5 w / 20, 5 w / 30, w / 5 w / 40, 50, 10 w / 20, 10 w / 30 and 10 w / 15 w / 40, 50, 10 w / 30, 20, 15 w / 15 w / 15 w / 40, 50, 20 w / 20, 20 w / 30, 20 w / 40, 50, 20 w/on behalf of the winter with the smaller part Numbers, representing the summer part number is supplied by the higher the viscosity, the greater the applicable temperature range. ( 1) High temperature type ( Such as SAE20 ~ SAE50) : the figures show that the viscosity of 100 ℃, the higher the number, the greater the viscosity. ( 2) Low temperature ( Such as SAEOW ~ SAE25W) : W is only used to winter, the smaller the number the lower the viscosity, low temperature fluidity, the better. ( 3) All-weather ( Such as SAE15W / 40, 10 w / 40, 5 w / 50) : indicates the viscosity grade of low temperature respectively accord with the requirement of SAE15W, 10 w, 5 w, when high temperature viscosity grades respectively meet the requirements of the SAE40, 50 general type belongs to the winter and summer. 5 w - sichuan province There is no question of 30 of the oil.