Wow!
I thought I was doing good in my Duramax, but some of you guys have sure got me beat.
I've gotten a whole bunch of tanks around 25 mpg, and have flirted with 30 mpg on a couple trips, but I really gotta watch how I drive to get that.
Sounds like the right 6.2 in the right truck with the right gearing can beat that without even trying.