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This is where a Scangauge/Ultragauge pays off. Use the trip mileage gauge to get the average MPG from a stop (reset to zero) to a fixed point down the road. Accelerate to the same speed every time, but at different rates. Make sure that you are traveling at the same speed when you pass the fixed point. The acceleration that gives you the best MPG at that point is the optimum for your vehicle.
My truck gets the best MPG when I step the gas pedal about 2/3 down and shift at 2500 RPM. That acceleration is similar to everybody else, so I'm moving with traffic.
Be aware that ambient temperature, engine temperature, and wind will all affect your results.
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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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