Dts oil purification adopts the pure physical low temperature distillation and micro-filtration purification technology, it can rapidly separate all kinds of contaminations such as moisture, oxides, metal impurities, carbon residues, colloids, suspended and emulsified matters from waste oil, completely restore the physiochemical index (i.E. Viscosity, ph value and flashing point) of the waste oil to meet the standards to be exactly same as brand new oil.