The Greasecar Vegetable Oil Conversion System is an auxiliary fuel modification system that allows diesel vehicles to run on vegetable oil in any climate. By using waste vegetable oils as fuel, Greasecar customers reduce toxic emissions, recycle an over-abundant waste product, and dramatically reduce fuel costs…Asian food restaurants and bar & Grilles tend to use pure canola or soy oil which has a lower gell point and will be easier to collect and filter. As a basic rule of thumb, higher quality restaurants will use higher quality oil, most fast food restaurants use hydrogenated oil.