Only a single data point in my old Civic. I regret that I didn't take time to get a full set of data before selling it. 4 runs (2 each way), ~60 degrees and sunny, minimal wind.
60 mph = 40 mpg.
That's just a hair above the Corolla in post 1.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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