.
I did a little rough math on the idea of which would save more.
A new prius.
Or saving an old Mercedes and running it on veggie.
Seeing that the only thing you are saving on the prius is a few miles to
the gallon of fuel.
My figures came out that you would have to drive the prius for few thousand
or so
years to come out better than saving the old Mercedes.
RichC
.