Just bough 2011 6.7

[bigrpowr]

my 17' got 14.5 on the way home for 90 miles at 80 mph from the dealership . not impressed .

 

[04cr450]

It's brand new Mike lol when I drove 70 some miles home from dealer my truck got 13.3... now with 2,400 miles on it 17.9 is the best so far. Still bad but way better than 13 lol lol
Aside from that I feel like I go to the fuel station everyday with the tiny fuel cell in these things