We manufacturing oil filter which oil regeneration system is particularly suitable to regenerate used internal combustion engine oil including diesel engine oil, Hardness oil, used hydraulic oil and used machinery lubrication oil. This purifier can remove the tiny impurity dispersed in oil such as carbon particles and deep oxides, as well as bad substance such as colloid and bitumen. Thus, the clarity of oil is recovered, engine oil quality improved, performance of engine restored, abrasion reduced, these would ensure correct operation of lubricant system of a engine and extend the life time of engine oil and engine as well.