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Old 08-29-2012, 11:27 AM   #27 (permalink)
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It's interesting to noodle the graph...

But I'm not sure using average speed as a measurement over an entire tank works well as feedback to the driver unless the tank is predominantly highway/rural cruising, and other tanks results are over the same/similar route. (IE - controlling for as many variables as possible.)

EG: if a tank includes a siginificant mix of city/suburban plus highway motoring, how do you interpret the results & use the average speed number to your benefit?

Also: does the measurement of average speed include time stopped? (EG: the ScanGauge average speed calculation is not a "rolling" average, which would be more useful. Its calculation includes time stopped.

Consider too that spread out through the year, weather effects will affect the MPG numbers (cold weather = worse mileage; warm = better). How is that separated from the average speed variable?
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