I had a Plymouth [Mitsubishi] Colt 4-cyl manual shift that I regularly got between 45-50mpg highway in the mid/late 80s.

I know some of the VW Rabbits in the early 80s used to get like 60mpg highway. Our huge Mercury stationwagon used to get as low as 8 mpg city in the 70s.
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Amo i Gemelli!! wink