2011 4cyl
I have a 2011 4cyl AC 5-speed. I have stock size tires but are LR-E, a ~1.5" OME Lift, a mid rise ARE shell, normally have a couple hundred pounds of junk in the back. I normally am around 20mpg in day to day driving. I have gotten as much as 25 but that was one trip going 60mph in the summer. Without roof bars on in the summer I will get 21-22 highway (60-70mph) and 20 city. If it gets cold these numbers drop. If I go over 70 I get 20mpg and over 75, 19mpg. 75-80 into a headwind is a bear and then it really drops to ~17.
I find the truck very drivable and am happy with the power, but I am not in a hurry most of the time.
I tried going to 32" (235/85) tires and it hurt my mileage about 2mpg, which wasnt acceptable for me so I went back to stock. I found that these trucks are geared pretty high and although plenty of people put up with it I didnt want to hurt my mileage/ power. I often tow a raft trailer, which it has no problem with, but also hurts the mileage depending on load and if the boats(s) are inflated or rolled.
If I were to go up in tire size I would definetly regear. With 4.56's and 33's you are geared lower than stock so that would be my plan.
That is my real world experience and I am constantly watching my MPG's. I have seen people report mid 20's with a stock unloaded truck like mine but that configuation wouldnt do what I want and I dont see those #'s. I hope this is what you were looking for, good luck.