We've now had our 2690SF for a year and have accumulated a bit over 15k miles on it, the last thousand or so with the ScanGauge. For the 15K miles, we had 53 fill-ups and averaged 9.2 mpg. We do tend to drive pretty conservatively; mostly 60 to 65 on highways and 55 on country roads. With the Scangauge, we found the most meaningful (to us) read-out parameters were throttle percentage/horsepower/mpg instant/mpg leg average. On our last trip to Fl, we enjoyed the open highways (95 north of Fl); traffic morasses (95 south in Fl) and a lot of central Fl open roads, towing a kayak trailer, and by driving mostly about the 20% throttle position we stayed pretty close to low 60's mph but got 9.6 mpg average for the trip.