How to distinguish inferior oil filter?

Inferior oil filter distinction:
1. The font printing on the surface of the filter is blurry or not clear enough. The surface of the font printing and paint is inferior, and the thinner one is the inferior filter.
2. There is no bypass valve, if not, once the filter is blocked, the engine will not be able to get enough oil lubrication.
3. The material of the filter paper is different, and it is difficult to achieve the predetermined filtering effect. The use of low-priced filter paper to make filter elements, due to its large pore size, poor uniformity and low filtration efficiency, cannot effectively filter out harmful impurities to the engine, resulting in early engine wear.
4. The sealing material of the gasket is poor, which may cause oil leakage and even fire under high temperature and high pressure. The sealing material of the gasket is good, and the rubber parts are regular.
5. The thread processing is precise, and there are no obvious turning marks on the thread.
6. Metal parts such as filter element end cover, central tube and shell are not treated with anti-rust treatment, which will cause the metal to corrode and produce impurities, making the filter a source of pollution.
7. The metal oil-passing net is rough in workmanship, and it is difficult to ensure sufficient oil flow.