Yeah, I've been looking into Bio as it is really starting to pick up in my area. I've found however, that buying bio is approx. 3. 70 a gallon, to have 2500 shipped to my house, and 3. 90/gallon for anything less than 2500 gallons. As SVO (straight vegi oil) is concerned I would stay away from that, it costs about 1500 dollars to set your truck up, you need a secondary tank with a heat exchanger, to warm the fuel up to operating temps. and I talked to a guy that ran it in his ford, he was happy, but he had to put in a $23. 95 fuel filter every 500-1000miles. Not cool. Bio, I think has potential, you don't need to convert your truck, if you build a refining system, it costs about 75 cents per gallon to make, and in colder climates, you can mix it with diesel #2, or run 100% diesel #2 again. No special converting, go back and forth between the two. However I've heard of a 5-10% decrease in power and Fuel economy. So that is pretty much all I know.
Oh yeah, there is some speculation that it may lead to injectors getting gummed up, however I don't know anyone that has run it long enough to find out, no one I know has more than about 15-20k on it. But it seems fine at that rate.
Sean