Today I did my first longer trip since I got my Scangauge a few days ago. And I must say I was quite happy with the results! The trip was just over 2 hours (120 miles roundtrip) and about 3/4 of it on the highway. Despite the fact that I have not made any mods to the car yet (I haven't even gotten around to increasing the tire pressure - shame on me!) and that I was using the AC most of the way (humidity here was killer today) I still managed an average 35.4 mpg in a car that rarely ever got above 27/28 before. Scangauge FTW!