I'm getting consistently 24.5 on my regular commute, which is basically 70 mph traffic in the morning, 60 mph in the evening and stop and go intermixed with just normal suburban driving. haven't had it yet on an extended trip so can't tell how much it would be, but I'm guessing about 30. Great in my book for a car of this caliber. yeah, could maybe eke out another 2 mpg if I kept the wing down on the commute, but i get so much pleasure out of having that darn thing come up at speed that I'm willing to sacrifice it.