I can't find any suppliers locally, I was told by a friend yesterday that the state is buying up a lot of the used oil to make their own bio. They have been experimenting with alternate fuels and hybrid vehicles for some time. They bought a lot of natural gas vehicles, and found a lot of problems with suppliers, mileage range,blowing spark plugs rightout of the heads on some ford pickups,plus the fact its not even available in some areas, like here where I live. I can burn wood for heat, but that's not cheap if you have to buy it either,let alone all the other downsides to it. I'm talking to people now to see if I can get a few partners in on the bio, I've got plenty of time to invest, so all I can do is put the idea to them and see if anyone else wants to jump in. Hank