That has been my find too. The slower you keep it, the better, but there has got to be a point of diminishing returns somewhere. I drove to Denver yesterday (1,000 feet up and then 2,000 feet down) at ~58mph and managed my best ever 72.5mpg for 79 miles. The mileage really starts to climb on those slight downhills when you glide, and that drive is just about perfect for the slight gliding downhills. Of course, I'll only manage mid 50s on the way home. Still, an average of 72.5 and 52 is 60mpg....I love hills!

Commuter car, grocery getter, and summer road tripper--average 10k miles per year.


Winter road trips and ski trips, bad weather commuter and my wife's "daily" driver--expected average 4k miles per year.