Enjoy the ScanGauge D. It is a good tool to have but I think the MPG feature is a waste to time. Maybe it is me but setting it up and getting it correct every time isn't worth the hassle.
I use my coaches information center to display MPG and Instant MPG. With that I use my SG to show water temp, tranny fluid temp, Load % & Boost.
For average MPG I just use my tank to tank fill up information. Yes, it includes any generator burn but it is good enough for my needs.
Don, Sandee & GSD Zeus. Gardian Wings earned are GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.