http://www.articleheaven.net en-us editorial@articlealley.com According to the Environmental Protection Agency (EPA), used motor oil is any petroleum-based or synthetic oil that has been used for vehicle lubrication. During normal use, motor oil becomes contaminated with impurities such as dirt, metal scrapings, wa... http://www.articleheaven.net/the-importance-of-recycling-used-motor-oil-1268381.html 01st December 2009