1. Various used oils are applicable, especially waste vegetable oil. 2. CE approval, using safety. 3. One year warranty. MODELEB- ... are applicable, e.g. used engine oil, used vegetable oil, used crankcase oils, used Glycerin, used Hydraulic oil, used synthetic oils, waste machine ... , waste grades #1, #3, #4 heating oils, waste mixed heavy oil etc., as well as regular oils, such as diesel, etc ...