An improvement to the barn doors that you haul/tow will do far more for your total fuel consumption than anything that you can do the truck. I'd guess that hauling just one of those buildings cuts your mileage by about half.
Most of the drag from the building is from those square leading edges. Is there any way that you could make some sort of collapsible tube and fabric rounded leading edge contraption to fit over the front of the first building? It would cut total aero drag by almost half.
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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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