Hey dude I just want to let you know if you weren't such a douche bag trying to prove everybody wrong I would tell you. But instead you think you are always right, if you don't believe me I don't care I'm still getting better mileage then you.
It's not that I'm trying to prove you wrong, I'm trying to get the right information. Unfortunately you seem to think this is some kind of competition where your manhood is in question and feel the need to resort to juvenile name calling.
Here's where I doubt your credibility. The fuel mileage ratings for your truck are about 16/17mpg combined depending on manual or auto. Even your before efan mileage is out of the norm and your after mpg is off the charts. Even McCormack said his best is 24mpg, not sure if that's a 4x4.
I'm not saying you can't get some good mileages, just that the running average should be pretty much within the norm. Sometimes people (especially with 4x4s) put larger tires on the truck without adjusting the speedometer, that will give them better than reality mileage. I can't verify on your method or math.
So right now I'll reserve believability until more people report their mileage with the same truck models/mods etc.