Update from my last post - I just got back from Long Island. I filled up right before I got on the highway, and filled up again as soon as I got off the highway back at home. I ended up with 26.4mpg on this tank, and that was averaging between 75-85mph without using cruise control, and having the AC on for about half the trip. Also I was in real bad stop and go traffic through the city near Brooklyn for about 30-45 minutes of the trip. All in all I'm happy with that. Taking the bad traffic out of the equation, I'd say its good for 27-28mpg. My 6-spd Z28 got the same exact mileage on the same exact route in the same conditions, so I am content with that.
