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I make a regular trip of 72 miles, with a net elevation difference of 800 feet (11 feet per mile). I drive 55 MPH in the 55 limits, and traffic rarely affects the mileage.
The "downhill" run averages about 4 to 5 MPG higher, each 10 degrees F changes mileage almost 1 MPG, and a light wind (not enough to make flags straight out) another 2-3 MPG. I've seen over 40 MPG and less than 25 MPG on that trip. That's Scangauge MPG. My Scangauge reads about 5% low, so actual mileage is slightly better.
A more efficient vehicle will be affected more by elevation, and your average elevation change was 23 feet per mile. Your mileage difference could easily be completely explained by the elevation.
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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.
Last edited by JRMichler; 02-22-2016 at 01:19 PM..
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