Minnesota has a minimum 2% bio-diesel right now. There were problems initially with quality, (Plugged fuel filters and the like), but I think it has gotten much better. I almost bought a setup to distill my own but there is no way I could've produced enough fuel to make it work for me. The time I spent chasing down used cooking oil, I can get more done at work and come out ahead. You can't stock up on B100 either. Bacteria build up and eventually destroy it. The cost, not figuring the equipment to make it or the fuel/time to get waste cooking oil, is about $.50 a gallon last time I checked, but it has been a few years since I looked into it.

I've got a Dodge Dakota for a run around beater that actually gets worse mileage than my 3/4 ton. Pulling the FXone it gets horrible mileage