Because re-refined oil goes through the same refining and distillation process as the crude oil that later becomes virgin, it can be as high of quality if not higher than virgin. Re-refining waste oil is environmentally friendly and requires significantly less energy to produce than virgin.
The filtration process begins by placing all material into setting tanks to remove all solids. The last step of the rendering process involves a high-temperature cooking and drying procedure used to decontaminate and separate useable and recyclable fat. It is heated in a vacuum to help volatile impurities.
Used oil should not be thrown into bins. Rather keep them unattended and list it to sale into for several cosmetics, biogas and animal food producing industry.