I know there is the technology available to make cars that run on water. Also diesel engines can run on recirculated vegetable oilif you put two engines in, let it warm up with the gas engine and then transfer to the diesel engine. My question is, has anyone marketed cars like this that we can buy? A car that uses almost no oil at all? Do you think having all cars run diesel engines with recirculated vegetable oil is a good idea as a long term replacement for oil fueled cars? Would it make a difference economically or environmentally or politically? Do you have any more info on this?