We used to own a 1995 Dodge Neon, manual steering, no AC, base engine with automatic. I got 41 MPG in it ONCE on a road trip at 80 MPH moving with traffic in the fast lane. Temperature was 80 degrees. I don't remember wind direction, but am sure it was a tailwind.
Driving normal (steady 60 MPH), I expected 40 MPG on the highway. Got 46 MPG at that speed once under ideal conditions.
So, yes, good MPG at high speed is believable under ideal conditions. But a one year average MPG is more realistic.
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06 Canyon: The vacuum gauge plus wheel covers helped increase summer 2015 mileage to 38.5 MPG, while summer 2016 mileage was 38.6 MPG without the wheel covers. Drove 33,021 miles 2016-2018 at 35.00 MPG.
22 Maverick: Summer 2022 burned 62.74 gallons in 3145.1 miles for 50.1 MPG. Winter 2023-2024 - 2416.7 miles, 58.66 gallons for 41 MPG.
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