I still haven't hit 25 mpg. But i don't go by the computer, i fill and calculate using trip odometer. I've been on a mission this winter trying different driving techniques and different gasolines. I drive 61 miles a day to work and back. 48 of that is interstate at 72 mph, rest is 45-50 mph. No matter how i drive it gets 20.5-22.5 mpg per tank. I read on the W8 forum where some guy got better mileage with 89 octane so i tried 2 tanks of 91 and got a dismal 18.7 mpg, lmao. Now when the winter gas is gone i do get 24.5 pretty regularly. I am however always driving in the mountains. Thank God!