This oil purifier is special for recycling kinds of engine oil used in ships, cars and other vehicles. LYE series oil filter machines cannot only remove the carbon particles, deep oxides, etc., but also can filter off the harmful matters such as colloid, bitumen. the quality indexes are improved, so as to resume the performance of engine oil, keep the engine being lubricated, guarantee lubricating system of engine to work properly and prolong service life of engine oil.