« Reply #7 on: August 06, 2008, 05:09:41 PM »
ANY diesel engine will use 'bio diesel' (french fry grease) BUT it burns at the same or GREATER rate that regular diesel so how he is going to double fuel hours per gallon is a mystery to me.
Absolutely.
I have a friend that makes and runs bio-diesel in his trucks and farm equipment. His words were that he gets about 10 to 20 percent less mpg than with regular diesel, depending on the vehicle and how it is driven. The savings is only in the cost per gallon area (which I'll admit is a considerable savings, until fast-food chains wise up and start selling the oil instead of giving it away).
Plus, all the tree-hugging celebrities that tell us what we 'ought' to do pollute more air on their constant airline trips than we do driving.
I bet Al Gore burns more fuel on one cross-country tree-hugging book tour than my Chevy burns all year.

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