| http://www.w3.org/ns/prov#value | - A method of removing contaminants suspended in substantially dewatered waste crankcase oil, including detergents and other additives adapted to suspend such contaminants in said crankcase oil, said contaminants including metallic iron, iron-containing compounds, and other nonhydrocarbon containing contaminants, said method comprising treating said waste crankcase oil with from about 0.1 percent to
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