Most, however, are served by haulers who pick up used oil and deliver it to processing plants that clean it up for reuse as a fuel at asphalt batch plants, limekilns and other industrial furnaces. Used oil has high energy content and requires minimal processing for reuse as an industrial fuel. A major regional refinery also takes used oil from throughout Wisconsin. The refinery, located in East Chicago, removes contaminants from up to 90 million gallons of oil each year. The finished product is a motoroil that is as good as that which can be made out of crude oil.
Refining can recycle oil again and again, compounding the savings.
Use a funnel to avoid spills. Don't mix or blend your oil with anything else. If you change your oil filter, drain the old one by punching a hole in the top and inverting it over your drain pan. Dispose of the old filter by putting some paper towels over the hole. Then put the old filter and paper towels in the box the next filter came in.