Plus, at some point I think we will have a convergence of political influences that will make bio-diesel more desireable.
1) Petroleum costs compared to bio-diesel costs.
2) Patriotism. i.e. sending money to US farmers rather than Arab terrorists.
3) Fuel economy, amplified by hybrid diesel-electric.
4) Renewable fuel.
At some point it may turn out that gasolene will revert to being "cleaning fluid" as it started out.
Ken300D