best i've ever gotten was 32mpg on a trip to NC last july. this was fully loaded with the a/c on the whole way. i found that around 70 mph is optimal speed for gas mileage. i was following my parents the whole way down (they drive 70) so that's how i figure i did so well on gas mileage. on long trips when i can cruise at 80 i usually average around 27 or 28.
