... lubricatingoil, extend its use period.The oil filter should have strong ability to filtration, small flow resistance, long life and other properties ... temperature change,filtering impurities, ensure enough flow.b)The rubber sealing ring: high quality oil filter sealing ring is to use ... lubrication particles (< 3 uml-ocl 30 um)3)The oil flow of oil demand with the engine4)Change cycle is long, at least ...