Keep good records and monthly calculate fuel mileage by truck, by driver, and by route. If one or a few drivers clearly are better, give them an appropriate bonus check at the end of the year.
All drivers take an update class on driving skills. The Smith System sounds good. All of the principles of safely driving a heavy vehicle will improve fuel mileage. Follow that class with tips on driving for mileage. DWL improves mileage without affecting trip time.
Increased coasting (DWB) before speed limit changes and stop signs does affect trip time. So does driving at slower speeds. Run some tests to find the actual effect on trip time and fuel mileage before pushing these.
If the second year shows an improvement in fleet fuel consumption, everybody gets a bonus. One or two standout drivers may get a larger bonus.
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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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