MY PUP with 21" Uberturbines and I am getting 270Wh/mi average in the mountains, and 258Wh/mi on the highway at 75-80. I have over 1200 mi on it now, and have not actually taken it on the interstate, but I have driven a lot of back highways. Bear in mind NM is a high altitude state, but the temps are in the 80s -90s now. The stock tires are not going to cut it as soon as the snow falls this fall though.