Southpaw, you did your friend a real favor - there are some hack job systems out there. Even some of the more popular kits (not going to name names) are real harmful. If that kit had the veg oil going through the stock fuel filter, there might more to do than just un-installing it. Hopefully that motor hadn't had a lot of oil going through it...

X2 on the "Picken's Plan" and USA-born energy. One step at a time, I've been firing OPEC from my life. As something wears out, I make another change. Next up on my list are: more diesel vehicles, diesel generators and a combo solar/waste-oil furnace for hot water. Yup, everyting will run on waste veg oil.