fwiw, you can convert a Dodge Cummings diesel-engined pick-up to burn WASTE VEGATABLE OIL (WVO) for less than 400.oo.
MOST diesels run BETTER/quieter/much longer on WVO!
free dixie,sw
Do you know how much waste vegetable oil there is out there in relation to diesel? It's miniscule and as a fuel is good to solve disposal costs. Check the price of unused vegetable oil to see what the real price comparison is if you are talking about going to biodiesel to replace diesel.