I found a link from the U of MO. and a lot of there testing was on CTDs,[ one of these days I will figure out how to paste addresses in. ] the only problum to speak of, was a high % of veg. oil would start to disolve the rubber hoses and seals and they solve that problum by replacing with viton hoses and seals, a big + was veg. oil lubed the fuel system better than diesel also the veg. oil would clean out the fuel system, need so replsce filters frequintly at the begining of switch.