Interesting- I have a friend who drives a propane conversion truck. He gets 11mpg on propane and 14mpg on gasoline. I think his is a dual fuel- runs on either one, switchable on the fly.
Where were you thinking of putting the tank?


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95 Montero SR - 207k miles, rebuilt @ 146k
Stock. Longview, Texas
Ithaca, NY for the summer of 08.