Quote:
Originally Posted by bwilson4web
Good data keeping but the only thing missing are the elapsed time per segment. When doing trips at highway speeds, it helps if you can use cruise control and the time to confirm the speed. Then vary the speed in say 5 miles per hour segments to plot the MPG vs miles per hour. This helps identify optimum cruise speeds for best mileage. Just a suggestion.
Bob Wilson
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Too true. However, in this situation, the terrain was
massively different per tank. For example, <27MPG was climbing the Rocky Mountains, >29MPG was coasting down them (:
We used cruise control
A LOT. My rule of thumb is 110% of the speed limit, rounded down. For 65MPH limit I do cruise at 71MPH. For 75MPH limit I do 82MPH.
Interstate Speeds (according to my feeble memory)
Arkansas 70
Oklahoma 75
Kansas 75
Colorado 75
Utah 75
Idaho 75
Oregon 65
Washington 75
Canada 100km/h (62mph)
Montana 75
North Dakota 75
Minnesota 70
Wisconsin 65
Illinois 70
Missouri 70