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Old 08-07-2017, 02:08 PM   #9 (permalink)
JockoT
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Join Date: Jun 2017
Location: Scotland
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All That Jazz - '06 Honda Jazz i-DSI S
Team Honda
90 day: 48.72 mpg (US)
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Unfortunately the GPS doesn't have an odometer function. The ScanGauge obviously uses the same speed/distance sensor (mounted on the transmission) that the Speedometer/Odometer uses. The Dashboard Fuel Display was within 1% of the the calculated mpg which was much closer than the ScanGauge had figured on, which is probably down to the fact that the fuel had been used over a greater mileage than the ScanGauge thought.
I am beginning to think my best bet is just to use the ScanGauge to show how my fuel efficiency is going, mile by mile, then calculate the actual mpg at fill up, as I have done for the past 50 years.
Trip odometer reading / gallons to fill up = Miles per gallon.
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