The oil filter, also known as the machine filter, is located in the engine lubrication system.The upstream of the machine filter is the oil pump, and the downstream is the parts that need to be lubricated in the engine.The machine filter filters out harmful impurities in the oil from the oil pan, and supplies the crankshaft, connecting rod, camshaft, supercharger, piston ring and other motion pairs with clean oil, which plays the role of lubrication, cooling and cleaning, thereby extending The life of these parts.