We drove 1100 miles from corpua christi texas to omaha nebraska to have thanksgiving with my oldest son. Jeep got 19mpg for the up leg doing an average of 80mph.
Its cold up there. The high was the day we got there, 46. Everyday after that, the high was 32ish. The mornings were 11 degrees and less. When we cam home, it was 7 degrees. Thats horrible. It sucked to out gas in the jeep that morning.
The return leg we got 22mpg for the 1100 mile trip. We actually got 24mpg from dallas to san antonio because we were able to draft at 90mph.
Anyways, the soft top was perfectly warm the whole trip. We didnt try to open the back window though, it was pretty stiff.