I think it's at least made in the same refineries, so it's pretty similar. I'm not gonna chance it with my car though... BioDiesel can be a good alternative, but not in the cold. Also, my car has a Bosch injector pump, and they warn against the use of BioD even in small percentages when mixed with petroleum based Diesel fuel. I don't want to chance ruining the injector pump because it's a very expensive repair - it would take millions of miles of driving to pay that bill!Originally Posted by masdog