Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and workpieces. It mainly functions as lubrication, cooling, rust prevention, cleaning, sealing and buffering, etc
Lubricating oil types can be divided into three types: Summer, winter and four seasons oil 1. Winter lubricating oil types are: 0W, 5W, 10W, 15W, 20W and 25W respectively. The symbol W represents winter is the abbreviation of Winter. The smaller the number before W is, the smaller the low temperature viscosity is, The lower the minimum temperature is applicable. In sum, that lubricating oil type are 20, 30, 40 and 50, respectively. The larger the number, the greater the viscosity, the high the applicable maximum air temperature; The types of general lubricating oil in winter and summer are: 5W / 20, 5W / 30, 5W / 40, 5W / 50, 10W / 20, 10W / 30, 10W / 40, 10W / 50, 15W / 30, 15W / 30, 15W / 20, 15W / 50. 20W / 30, 20W / 40, 20W / 50.
The smaller the number representing the winter part and the larger the number representing the summer part, the higher the viscosity and the greater the applicable temperature range.
High temperature type (such as SAE20 to SAE50): The number indicates the viscosity at 100 ℃, and the larger the number, the higher the viscosity.
Low temperature type (such as SAEOW to SAE25W): W is used only in winter, the smaller the number, the lower the viscosity, and the better the low temperature fluidity.
All-weather type (such as SAE15W / 40, 10W / 40, 5W / 50): Indicating that the viscosity grade at low temperature respectively meets the requirements of SAE15W, 10W, 5W, and the viscosity grade at high temperature respectively
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