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Some time ago I calculated power to overcome estimated aerodynamic drag plus rolling resistance plus driveline friction plus accessory losses, estimated the engine efficiency, and used those numbers to get a theoretical estimate of gas mileage. I convinced myself that the 2.8 L is a very efficient engine.
Then I looked at the effect of wind on gas mileage. And the effect of driving habits.
I am convinced that I can get significant further improvements in MPG by aerodynamics, specifically air dam with belly pan. Possibly also wheel covers and wheel well skirts. But not by modifying the engine.
I need a better air dam anyway. The factory one is barely held on with Gorilla tape and wire ties after plowing through too many snowbanks.
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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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