6k plus miles later...well got a lead foot love the hemi power so my fuel economy is shot/out the door (I only got a short commute to work). Although I did travel to Vegas several weeks ago (monitored it on the way at least twice) highway fuel economy is around 18-20mpg using cc most of the time, city is 13.8mpg.

 

Citadel, AWD, 5.7. Here's my mileage tracker in csv:

Tank_Entry, car_mpg, measured_mpg, drive_type, octane
1, 12.8 mpg, N/A, 75% city, unknown octane supplied by dealer
2, 12.0 mpg, 11.4 mpg, 100% city, 89 octane
3, 13.1 mpg, 12.75 mpg, 90% city, 93 octane
4, pending, pending, pending, 89 octane