Used Engine Oil is a dark, viscous, and highly contaminated oil which is collected from engines and machinery after use. It is a hazardous waste material containing harmful contaminants such as additives, heavy metals, and other toxic chemicals. It is often recycled or re-refined for removing contaminants and extend its useful life. The re-refining process involves filtering and distilling the Used Engine Oil to remove impurities and restore its original properties. The recycled oil can be used in a variety of applications such as generators, industrial burners, and hydraulic systems. Proper disposal of this oil is important for preventing environmental pollution and health risks.