MPG and power running on veg oil

A vegcar.net reader asks:

I [am] interested in running a diesel pickup (Ford F-250) on WVO. What kind of performance-MPG, HP can I expect? could you tow a small boat or plow snow effectively? I realize the engine size,vehicle weight, climate, altitude etc. can make a difference. can you give me some guidence with these issues?

I'll try. To the best of my knowledge, diesels running on vegetable oil usually get just about the same mpg as when the run on diesel. As far as power, I have seen Ford diesel trucks running on veg oil pull a trailer with 1,000 gallons of veg oil on the back. Together with the trailer, this is over 9,000 lbs. I have heard some folks claim that there is a 5-10% loss in power when running on veg oil but I haven't seen any data on that. If anyone out there has some information on this, please send it my way and I'll post it.