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Old 04-28-2008, 11:25 AM   #9 (permalink)
EcoModding Lurker
Join Date: Apr 2008
Posts: 21

Focus - '05 Ford Focus ZX3 SE
90 day: 30.86 mpg (US)
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You have to look at averages, that's why. Yes, while you are engine-off coasting, you are getting infinite MPG during that time, however, you will not continue forward forever, and it took fuel to get up to that speed to begin with. You have to average over some distance, say, an entire tank of fuel, and see how far you get. Yes, during some of that trip, you will be engine-off-coasting, but during other parts of the trip you will be using fuel just like any other commuter out there.
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