69.5mpg doing 60 consistently with a little semi truck following action.
Usual 60mph runs with the AC off ( in the far right lane of course ) result in mid 50's - low 60's.
One day i want to crack 70, but it's easier said than done.
Oh yeah, my car is a manual and i've been hypermiling various cars for 13 years.
City driving fuel economy is much lower - in the 30's-40's, hence the lower average.