I just did a check yesterday. From Bremerton WA to Lynnwood WA (about 90miles) on freeways. Some parts @ 65mph, some parts @ 75mph, easy on the throttle, 6th gear most of the time. Average was 27mpg. I have aFe intake though, and it helps about 1-2mpg.
On the other hand, I got ~6mpg at the Bremerton Raceways.