All good things come to an end......
I ordered a Ford Maverick on September 10, and was emailed September 16 that it is scheduled to be built the week of November 1, 2021. So I will be selling the Canyon. I put the Canyon back to its original configuration by removing the kill switch, vacuum gauge, grille block, air dam, and aero topper on 9-17-2021. I reinstalled the original Leer 100R topper and front bumper that same day.
The last two fillups with the aero mods had about the same weather and driving routes as the first two fillups with the mods removed. The truck is now approximately Revision C with tire pressure about 40 PSI.
Gas mileage with aero mods: 37.4 MPG over 1005 miles.
Gas mileage with mods removed: 30.5 MPG over 789 miles.
The recent mileage is slightly better than the 29.7 MPG from Summer 2008. The recent driving routes have slightly worse MPG, which is more than compensated by 13 years of practice at DWL, DWB, and engine on coasting. The truck has 161,000 miles on it, and the engine has the original spark plugs. The tires have about 1/3 tread left. I did not add the last two fillups to the gas log. The mods definitely improved mileage.
There are two things that I did not test:
1) This truck uses 5W30 oil. I wanted to test 0W30 oil, but needed a long baseline after my driving routes changed.
2) I had noticed that the MPG improves approximately 1 MPG per 10 deg F average temperature, up to about 70-75 deg F. Above that temperature, the MPG stays about the same or even decreases slightly. Using the AC might account for some of that, but I wanted to test the hypothesis that the increased temperature was causing the knock sensor to retard the timing. The test would have been to fill with 91 octane fuel. Unfortunately, that would have been two changes: from 87 octane 10% ethanol to 91 octane 0% ethanol.
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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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