I have an 11 with the 5.7 4x4, trd with tow package (4.3 re). calendar year 2013 was 16.6ish mix of rural town, highway and off road with 4x4 driving in winter and off road. I don't drive it like I stole it (most of the time) and it does fine between fill ups.

It's good to lead - it's better to lead by example.