One of the best motors around for running biodiesel. With it's hydraulic actuated injector system it's tough and tolerant of alternative fuel. I have run my own homebrew in my '01 PSD F250 4x4 for the past 4 years (20k miles or so), on mostly B100. Last winter when it dipped into the teens, I blended down to B70 with pump #2. As you know, it rarely gets that cold around here.