Has anyone tried or considered making their own biodiesel? With diesel fuel rising daily, I'm looking at all avenues. I paid $4.52/gallon at a truck stop today. Would biodiesel work in heavy equipment, or would it be lacking in sulfur or something else? I've been looking at the kits like this: http://www.fuelmeister.com. The worst thing with this that I can see is transporting the used oils from a restaraunt or wherever, but it might be worth the trouble if it is true that you can make fuel for around $.70/gallon. I'm sure there is a pain in the @ss factor, but it might be worth it if these insane fuel prices continue to rise. Any thoughts?