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.
That is what the guy in the link in #3 says, you have got to think big, really big.
since a FEW people founbd out i was looking for some, i've been "covered up" with offers to BRING me WVO.
free dixie, sw