You fellas getting into the 80-90mpg range.......are those US or standard gallons? My best so far is 67.3 miles per US gallon, and I average around 64-65 in my daily commute. I do keep reading that some folks shift at 2500, but that's way to low for me. 4k at least before I hit the next gear.
I log my fuel entries in miles and US gallons. You can view the results in Fuelly in the units of your choice.
Greg