'98, cross country from NJ to AZ, usually run 75 in the east where the limits are 65 or 70, then 80 to 85 when the limits raise to 75 (I make the trip at least twice a year). Highway last trip stayed around 22-23 mpg. I don't drive it around town much, I have other cars for that.
Changed to springs instead of air bags for suspension, so I don't get the 2cm lowering effect to help mileage. But the ride is fine anyway.