2013 R/T 7 passenger with the 3.6 VVT/6spd auto. Bought 12/28/12.
Per EVIC the "lifetime" (hasn't been reset) since purchase is 23.8 mpg, with hand calculations being pretty close; last tankful 22.9, one before 23.8 mpg.
We are rural, in the foothills of the Alleghenies...speedlimits are 55 mph, but, due to the winding nature of the roads and the steep ups and downs, the actual average speed is between 40 and 45 mph. Very little "town" driving, and our town is small (only one traffic light) and if you blink twice you are through it. Compared to the '08 Hemi Commander that I traded in on it, I'll take it!