I am just about to hit 5k miles on my HH. MPG has been increasing as the miles have been put on. Most recently, I have been getting 29 mpg in city driving and think I can increase that a bit more once the weather warms up this spring. I can't help you on highway mpg as I do very little highway driving. In fact, I have started to plan routes to aviod what little highway driving I do now trying to squeeze another mpg or two out if my HH.

Kace