Before I had the AVM hubs I had the PVH hubs locked all the time. I was averaging 12.5 mpg being easy on the pedal. Now with the AVM hubs left in the free position, my fuel milage has jumped to 13.25 mpg being really harsh on the skinny pedal. So if I am easy on the pedal I could no doubt get at least 13.5 mpg. It is a good solid 1 mpg increase, the way it lightened up the steering would alone be worth the purchase.