We drive a Ford F-350 on waste vegetable oil - garbage - that we pick up for free at Asian restaurants. To date we have driven this truck over 60,000 miles on vegetable oil (a distance of 2 times around the earth) with great success and no hiccups. Why are we not doing this on a larger scale? To the right is an interview David did in the summer of 2005, when California gas prices were over $5.00/gallon.
Also check out our Epic raw food/vegetable oil video at right that we filmed in Bakersfield, California. On that trip, we drove 2,300 miles without seeing a gas station or vegetable oil stop, then filled up with free oil and drove back to Arizona for a 3,000 mile trip all on vegetable-based fuels.