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OK, do you believe that ScanGauge fuel burn rates (GPH) are at least semi-accurate? Because I can be going up a long slope in 5th at about 45 mph, and the ScanGauge will show about 1.0 GPH fuel consumption. Downshift to 3rd, maintaining the same 45 mph speed - and thus the same power output to the wheels - and it will show that I'm burning 1.5 gph.
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