All you have to do is convert any diesel car to "biodiesel" so that it can run on used cooking oil--which you can get from any restaurant for free and cut waste at the same time.
"Waste vegetable oil
As of 2000, the United States was producing in excess of 11 billion liters of waste vegetable oil annually, mainly from industrial deep fryers in potato processing plants, snack food factories and fast food restaurants. If all those 11 billion liters could be collected and used to replace the energetically equivalent amount of petroleum (an ideal case), almost 1% of US oil consumption could be offset.[6] However, use of waste vegetable oil as a fuel competes with some already established uses."
http://en.wikipedia.org/wiki/Straight_vegetable_oil
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