According to GB 498-87 General Classification of Petroleum Products and Lubricants, this standard divides lubricants into 19 groups according to the principle of covering the application occasions of lubricants and related products as much as possible. The group name and code are shown in the following figure:

Extended data:

1. Lubricating oil is a liquid or semi-solid lubricant, which is used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and machined parts. Mainly plays the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and Roab.

2. Lubricating oil generally consists of base oil and additives. Base oil is the main component of lubricating oil, which determines its basic properties. Additives can make up for and improve the shortcomings of base oil properties and give some new properties, which is an important part of lubricating oil.

References:

Baidu encyclopedia _ lube oil