SVO not WVO?
I believe he wrote Bio-D and SVO. SVO is different than WVO. I understand SVO is refined vegetable oil like you cook with. Waste vegetable oil is the stuff that restaurants use in their deep fryers. I also believe that this stuff is often a liquid shortening meaning it is partially hydrogenated. If he meant WVO great. If he actually meant SVO, then I would like to know if those two can be mixed.