... oil. It is used to purify the parts washing oil (such as kerosene, diesel, and gasoline) in aviation, spaceflight, vehicle, motorcycle, ... new oil (grade 6). The washing oil, such as aviation kerosene, used in bearings manufacturer and gears manufacturer, is often mixed with ... of the waste oil (except the oil mixed with phosphor and super fine liquid). HYF light oil separating and purifying machine