[Hal Copple]

my mpg varies greatly depending on how much town driving i do on a tank. A mostly city tank gets me 11-15 mpg at most, but if i just tank up and immediatly get on the interstate at steady cruise, it will jump up to as much as 20+ mpg. I have a stout stroked windsor, Tremec with a .68 fifth, so i am only loafing along at about 1900 rpm in fifth at 60 mph, so it does make a big big difference, mostly depends on how much gas goes down the venturies in fifth gear, or a lower gear.