first off welcome! Hope things work out and you can join us with your new Jeep.
I'll give you my mini write up that I put on another thread:
"I have the Hemi in my (05) WK. in town with no AC and driving like my grandma I get about 13. when I dig up my 16 year old self, and the wife isn't around, I get around 10 sometimes less.... highway at around 68-70mph with cruise control I get close to 20 every time, which then drops to around 18 as the tank gets low. I don't really think its all that different from the v6 (from what I've read)
once you come to terms with the fact that you will never get decent mileage with the Hemi, (although I consider highway mileage somewhat decent for the engine) you will have a smile every time you enter that onramp and give her all she's got."
people will ask all day, "What can they do to improve mileage?". The fact is, this Jeep will never get drastic changes in mileage with mods (CAI, Exhaust, etc.). you might pick up 1 or 2 here and there *maybe* might even get some with a tuner 9I have no experience with this though). so when you're making your decision, keep that in mind and BE REALISTIC.
I do hope this helped.
best of luck! hope you get it!