Question by kk g: how do people make money from recycling wasted oil?
what do they do after they have collected the wasted oil? how do they recycling the wasted oil?

Best answer:

Answer by J.
It is n ot so much they make money off of it, they most often use it for heat. There are furnaces built for burning motor oil. Those facilities that collect a lot of oil often sell it to cement factories for producing cement. Lesser amounts often are collected by heating a garage, barn or workspace.

In a perfect world they would have it analyzed for metals content, to meet EPA standards but more often than not it is used as an excuse to track and quantify amounts burned for purposes fo future carbon taxation.

Waste vegetable oil is a different matter entirely. In summer, many diesels can run on straight unprocessed WVO as long as it has been filtered. In winter it has to be processed, or mixed with regular diesel to be able to work in cold weather. There are some other modifications for cold weather use as well. Various agencies still want their fingers in the operations of such people who collect it for purposes of taxation and other matters.

So they are really not making much if any money off of reselling the oil, they are saving money by making use of a product that if rerefined, would not be as good as the virgin crude products, plus an unpredictable waste slurry that may or may not be suitable for asphalt.

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