I purchased a 2011 Durango about a month ago. I have been able to drive about 1500 miles on thus far. I have made two trips in the Durango, on the first one about 450 miles I averaged 21.5 MPG (calculated by hand). I purchased a K&N stock replacement filter, and made the same trip. I averaged 23.5 MPG. I have been really excited about this, I was just wondering what other new Hemi Owners were experiencing? While on the freeway i set the curse at 80 MPH. There includes one mountain pass. Elevation change is 5000, 8300,to 4200 feet.