I'll tell you one thing that Biofuels are getting a bad rep. for, is the weather, they can't handle the cold temperatures as well as oil based fuels. One School district in Mid-Michigan, recently changed all their school bus's over to Biofuel, I don't know whether it was Bio-Diesel or not, but it was either this winter or last winter when we had a severe Arctic Blast with high winds and very very cold air with wind chills down near -60 -80 Below or something, everyone of their Bus's Fuel turned into a jelly like substances and when thawed out was completely unusable. Every single bus had to have their gas tanks removed and cleaned, fuel lines cleaned, fuel injectors or carbs which ever they had rebuilt and cleaned. It cost the school system a mountain of cash to get the bus's operational again. I think it was in Alma, Michigan. Don't quote me exactly on everything I wrote, I didn't read an article on it or anything, the bus driver that picks up my kids told me about it. Scary thought though on just how reliable the Biofuels can be, I've heard of truckers that can't run Bio-Diesel in the extreme heat areas like AZ, New Mexico, ect. ect. I'm not trying to downgrade the Biofuel business, just putting the other side of the coin on the face of it.