Bio-diesel costs a lot more then .70. I have seen it for something like $3.70/gal. It generally costs more then reg diesel when ever I saw it . While it is a "green" fuel, I don't think it has the same energy density of fuel from the earth. The reason it costs more is it takes energy to actually make it. If you can get it for .70 I would look into it closely before you fill up.
|