First, let's get to know the oil filter. The main function of the oil filter is to filter impurities and dirt in the oil to provide clean lubricating oil to the engine, reduce wear and prolong engine life.
The current oil filter is basically a spin-on oil filter, and a round metal box outside is wrapped with folded filter paper, which is the core material of the filter paper filter. The current filter paper is heat-cured. It is treated, so it has a certain hardness and strength. Unlike ordinary paper, it can withstand oil pressure and is not easily deformed.