I can honestly say Ive never even calculated the MPG in my Jeep. That's not why I bought it. My DD I absolutely check it at every fill-up. I guess Im just a big proponent of having a secondary vehicle when you have a Jeep. I understand not everybody can do that, and to those folks I say "Suck it up and enjoy the fact you get to drive your jeep every day and stop worrying about your MPG!"
Im also submitting this post for the "least helpful ever" award.