ORIGINAL: Rudy61SRT8
And you should be under warranty anyway ... i'm sure this isn't a known problem because if a lot of people have the same issue i'm sure dodge would do something...
Do you have a preadator or any other mods ? Or are you completley stock?
I have the Mopar CAI, 40 series Flowmasters, and had the predator. Out of curiosity, I restored my original backup from the tuner several weeks ago to see if my gas mileage was any different without it. MPG was higher with the predator and the 93 ocatane CAI canned tune.