2014 Limited, V-6, AWD - longest distance on a full tank was 530.4 miles, took 22.8 gallons, 23.3 mpg. That was straight highway miles where the speed limit was 70, so I was doing about 75ish. I've done 500+ miles on a tankful half a dozen times, and over 490 another half dozen.
2017, 5.7 R/T RWD. 375 miles is the furthest I have driven it so far. The mpg reading says 24 mpg. Half the trip is a toll road at 75 mph and the other half is small Kansas towns at 30 mph with stretches of 65 mph.
Way better milage than my F250 V10! If that thing got 15 mpg I was stoked!!! Towing it would get about 8-10 mpg.
2017 R/T AWD 514 miles freeway 23 MPG -- I have meticulously kept track of my mileage since I bought it with 59 miles on it. Many high 400's though as I go on nice long trips, don't race much though mostly 70+ steady driving.
At 42623 at the last filling, I have 19.53111217 avg