you will need to run at least 10% petroleum diesel in order to get the DFA to blend with the Bio. However unless you are after the anti gelling agent it is just overkill. Actually the bio works much much much better then DFA. Just remember to keep a spare filter in your truck. After te first tank or two you might start to see white smoke. This is a tell tale sign to change the filter. Nice to see another BD user here too.