Finally found a fuel station that sells bio. it was only B2 and ULSD and I couldnt really tell a difference in the way the truck ran. I figure at 2% blend and I bought 28 gallons equals a little over a half gal of pure bio. So at 10 MPG i contributed 4-5 miles of clean burning bio. Hopefully I can find more of this stuff on my journeys and do my part to support american farmers, decrease demand for foreign oil, clean the atmosphere, etc. etc.