of course it is going to screw it up the fuel mileage feature is ment to work from full tank. I guess you could just hit the fillup button and ignore the miles to empty trip feature. That should do it for you.dank78 said:For those with SGII and utilize the mileage/fillup gauges, got a question. When I fill up but don't put a full tank in, it seems to screw up the numbers. Is there a way to "reset" the fuel amounts to sort of start over? I like mileage and miles til empty gauge, but once in a great while I just put in enough gas to get me where I'm going. Thanks...