Markaprice73,
Did you look at the UltraGauge? I have had an UltraGauge for about a year and a half and it preforms flawlessly. I think the ScanGauge and the UltraGauge have nearly identical capabilities except the UltraGauge only cost about $60...half the price of the ScanGauge.
Much of the capabilities of the two gauges depend upon what sensors you have on your vehicle and if they are available at the OBDII port. On my new Hyundai Tucson, I have a fuel level sensor so when I fill up, the Ultra gauge automatically registers the amount of fuel in the tank, while my older Toyota Highlander did not have the fuel level sensor so I had to push a button to tell it when I filled the tank.
I realize you said that you already purchased the ScanGauge, but I was curious if you had looked at the UltraGauge, and what made you choose the higher priced ScanGauge?
...Rich