Serious question. Are you really worried/concerned about your fuel mileage? I've read several threads about people watching their fuel consumption and I don't get it. You purchased a Jeep, a full-time 4WD vehicle that has never been known for fuel economy due to shape, drive systems.... ??? I buy vehicles for what they are. A Jeep is a Jeep. If I was concerned enough about fuel economy to monitor it, I would buy a Prius or some econobox.