The role of oil filter:
1. It filters out harmful impurities in the oil from the oil pan;
2. Use clean oil to supply crankshafts, connecting rods, camshafts, superchargers, piston rings and other moving parts for lubrication, cooling, and cleaning, thereby prolonging the life of these parts;
3. If you choose a low-quality oil filter, the impurities in the oil will enter the engine compartment, which will eventually cause serious engine wear and need to be returned to the factory for overhaul;

Identify the quality of the car oil filter: 
1. Look at font clarity
The surface of the high-quality oil filter is clear and neat, with exquisite workmanship and no bumps and burrs. Inferior ones have blurry fonts and rougher surfaces. The paint is not strong enough, and it is easy to peel off when the nail is scratched
2. Look at the packaging to verify the security code
The high-quality oil filter has a complete package, and the package is marked with the brand, anti-counterfeiting code, etc., and the QR code on the package is verified to verify whether it is genuine;
3. Look at filter paper
We all know that the function of the oil filter is to filter impurities and dust in the oil, so the quality of the filter paper is directly related to the performance of the product. Generally, the gap between the holes of the good filter paper is small, which can filter better, and the workmanship is relatively neat, and it is made of professional filter paper. Inferior filter paper is generally rough, not professional filter paper. It is made of cheap cotton pulp paper and has poor filtering effect.