I've had my beloved JX35 for 3-4 months now and it's awesome! Except...what's with the gas mileage? I'm getting 15mpg--not even close to the 18-21 that was promised. It's a little better with highway-only driving, of course, but not by that much. I drive around town in my suburban community 90% of the time. I'm hitting a gas station twice a week sometimes! I drive on the standard setting (the ECO setting is horribly cumbersome). My husband thinks there's something wrong with my car, so I'm wondering what kind of gas mileage do other JX owners get in suburban driving conditions?