Did you know there is a upgrade out for the ScanGauge? Version 4.02 was the first release with the updated menu system and performance monitoring and if you don’t have it you can upgrade for $25.00. http://www.scangauge.com/support/upgrade/
I use mine for water temperature, load, manifold pressure and miles per gallon. I love it when going down hill and the mpg shows 999999.