Quote:
Originally Posted by Old Tele man
...small fillups (<1/4 tank) almost always yield skewed results, which is why ScanGauge (and others) recommend almost FULL-tank (>3/4 tank) fillups when attempting to "calibrate" their SGII.
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It's better to wait until the tank is low to fillup anyway. Less gas in the tank = lighter car = better MPG.
