Re-Refining Recovery Methods of Used Lubricating Oil

Used lubricating oil (ULO) is any petroleum based or synthetic oil that has been used and during operation oil losses effectiveness due to the presence of certain contaminants from air, fuel combustion, oxidation and additives. Thus, decreases the oil quality gradually to a level that the used oil should be replaced by a new one, in order to maintain the engines in good condition, it is necessary that the engine oil must be replaced by new oil after certain period of service. Waste oil creates environmental pollution if not disposed-off properly. This article describes one of the best methods of used oil re-refining and compares its product specifications with those of virgin base oil