When you look at your mileage, make note of elevation change, temperature, wind strength, and wind direction.
I find that an elevation change of 800 feet in 72 miles makes a difference of 4 to 5 MPG depending whether I'm going uphill or downhill. The seasonal changes in MPG in my gas log are almost all temperature because wind mostly averages out, although today's fill was unusually good because I had almost all tailwinds.
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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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