Identify the quality of the oil filter element:
1. Anti-counterfeiting code: The genuine oil filter element usually has an anti-counterfeiting code, which can be scanned to get the relevant information of the product;
2. Filter paper: If it is a good quality filter paper, the gap between the holes is small, which can filter impurities well;
3. Font: If it is a good oil filter, the font is neat, while the inferior quality is fuzzy and rough;
4. Sealing ring: The sealing ring with good quality has no burrs, the workmanship is complete, and it is protected by petroleum jelly when leaving the factory;
5. See if there is a bypass valve: high-quality oil filter elements usually have a bypass valve.

The role of automobile oil filter:
1. Its function is to remove impurities such as dust, metal particles, carbon deposits and soot particles in the engine oil to protect the engine;
2. During the working process of the engine, metal wear debris, dust, high temperature, carbon oxide and gel deposits, water, etc. are constantly mixed with lubricating oil;
3. The function of the oil filter is to filter out these mechanical impurities and colloids, keep the lubricating oil clean and prolong its service life;
4. The oil filter should have strong filtering capacity, low circulation resistance, and long service life.