All I know is that if you have a diesel engine, you can run a vegetable oil for a while. But thats it for alternative fuel, everything else is a scam.
My ride(Cardomain link) :
'95 Contour 16V Zetec DOHC,
Teal , ATX
Born on Sep. 4, 1995
86+ miles
*LEDs mods are on their way!*