Thought i was saving money getting the BIO123 system. What they failed to tell me if you have more than 50k it could cause the build up in the cylinders to let loose and loss of compression is soon to follow. My tech buddy said he has seen it happen >>>Add oil Check fuel. That was a $15,000 dollar mistake. You can do what you want but i wouldn't recomend running 100%, no more than 20%. It takes alot of biofuel @ a savings of $1 per gallon to pay $15k. I'm sticking to lucas and 2cycle in my fuel. :$::$::$::$: Got a new truck that will never see that veggie oil again.