Yeah, when I'm cruisin (not rushing) on the freeway I try to let it roll at about 2k at 70mph. If I'm patient enough to keep that up, I get about 28-30 mpg, but it's usually pretty hard not to dart in and out of traffic with such a nice car.
Just for shits and giggles I reset the mpg on the computer to see what kind of mileage I'd get when I mash it (fully expecting to see it drop to about 3 mpg). I was a lil disheartened to find that the comp will log all data points, but it won't display anything less than 6 mpg. So I have no way of knowing how low it actually went. Haha!