Matt - so yours is locking up too huh - I find that if you shut off the ignition after being on for a time too short for the SG to communicate then it hangs and sometimes when changing the menu and then turning off the ignition screws it up too. Then it just hangs for no reason but I don't think it affects the fuel used total calculation just that it indicates that it was disconnected.
I stopped playing with the fill up adjustment after the first 9% correction was made because it kept messing with the instant MPG reading plus with the pump error we all know about who is to say what we actually are getting. The speed adjustment is still bang on with the GPS so that will stay at 3% until my tires wear down more but it probably could go up a little since it doesn't jump to the next MPH digit at .5mph over. So I am loosing a little of the fractional mph by rounding down all the time.
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