On a more serious note, a long upgrade like that requires a Scangauge or Ultragauge. Try different speeds and different gears, then stick with the combination of speed and gear that shows the best trip MPG at the top of the hill.
My truck, for example, would be near WOT in 4th gear or part throttle in 3rd gear on an 8% grade. Here's a thread discussing the same topic: http://ecomodder.com/forum/showthrea...ear-23957.html
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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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