Just got a new Scangaguge thanks to an SCOA member selling it to me. My old one that is in my other car doesn't have the XGauge.
I'm just doing the Tank Average on my main screen as I used to cycle through all the screens to get it. So now I have:
TAV (tank average MPG) FiA (air intake temp)
MPG (instant MPG) fWT (the water temp)
Now here's something I LOVE about the Scangauge. Last week I had to loan my car to my kid as
her car bit the dust. I was able to find out how she was driving it by looking at the day's history. I found out she never went over 65mph or 3350rpms and her average speed was within reason. All of my wife's co-workers tried to get me wound up and said they saw her racing at lights and I explained to them I had all that monitored - now they don't think I'm nuts, apparently it is confirmed.

Just another nice feature the Scangauge has that I like. Normally I net about 2mpg better because it helps me think about how I'm driving. I know because I have two identical cars and drove one without a Scangauge for 7k miles and got 41mpg and my other car that I put that first 7k miles on too I got 43-44mpg - on top of that I was using A/C a lot more back then.