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Old 08-31-2009, 12:04 PM   #31 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
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The ScanGauge readings weren't verified against filling the gas tank of the Vette - that's what I mean by uncalibrated. So yes, there's the possibility the MPG figures aren't exact... but it's unlikely they're out by more than a few percent.

My experience with the SG (comparing with "zero offsets" to filling the tank in several vehicles) is that it's not usually far off for "normal" driving, like the kind done for this test.

Quote:
I don't have or use a scanguage so maybe I just don't understand how it interacts with the car.
The ScanGauge calculates fuel use indirectly: it determines it based on air consumption, assuming a stoichiometric air/fuel ratio for a warmed up vehicle in closed loop operation (such as for this test).

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