There are 4 readout positions on the ScanGaugeII, and I have mine set like this:
(1) Trans Fluid Temp - needs to be programed in via instructions on the scangauge website. Once you figure it out once, you're set. Most useful. I monitor trans temp and stop to cool on the rare occasion when it gets higher than I would like.
(2) Coolant Temp - mostly uninteresting as long as the thermostat is working correctly. I guess it could be a great warning that something in the cooling system is going bad but I haven't experienced that yet
(3) RPM - again, mostly just for my amusement.
(4) MPG - amusement again, I already know it's low....
The ScanGauge does have some miles per tank and remaining miles estimation capability but I don't use it. The generator uses fuel and throws everything off. I don't really want to ever be close to E anyway.
