I stole this idea for a mounting point (Thanks Whippersnapper). So far, the Ultragauge has been great. The set-up is pretty self-explanatory. I haven't messed with it too much but I've got a question for you long-time Ultragauge users... I bought the Ultragauge, filled up my tank and just went for a refill. The Ultragauge says my average fuel economy is 19.0 MPG, my calculated MPG is 17. Anyone else notice this discrepancy with theirs?