Yeah, I was thinking about the 617.

You cannot measure fuel economy accurately unless you start with a fill up, the drive til it is lowish, keeping track of your miles traveled, then fill it again and divide the mileage by the gallons traveled.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.