Used oil is obtained from petroleum, coal, and shale oil, and its physical and chemical qualities havealtered owing to external factors during mining, processing and use. This type of oil cannot be reused. Lubricatingoil, gasoline, kerosene, diesel, hydraulic oil, grease, and other materials are commonly used in industrial production.It is difficult to degrade due to its structural integrity. The used oil was classified as hazardous waste in the sixthlargestcategory on January 4, 1998. Although used oil is hazardous to the environment, it does have some salvagevalue. This field is causing increasing worry among researchers. Used oil can be classified into the followingcategories, according to its source: crude petroleum and natural gas extraction; refined petroleum productsmanufacturing; coatings, inks, pigments, and related products manufacturing; specialty chemicals manufacturing;ships and floating device manufacturing; and oil-contained wastewater manufacturing, among others. In 2007,37.537 million tonnes of used oil were produced in our country. The purpose of this research was to evaluate andcompare the environmental consequences and benefits of a product's end-of-life situation. This paper will review thecreativity and innovation in used oil.