That's good gas mileage. My old Jeep got 12mpg city and 8mpg hwy. Yes, you read that right, it wasn't a typo. I got worse mpg on the hwy than I did in the city. 36" tires with 4.56 gears I would be cranking about 4,000rpm at 70mph. It cost me almost $200 in gas each way the ONE time I drove it...