With about 3000 miles on my new smart (I commute in Montana about 50 miles round trip 5-6 days a week.), I am averaging 42 mpg city and about 52 on longer trips. I wonder if I might be the first person to run OUT OF GAS in my smart!! I was not paying attention to the gauge, and boom! OUt of gas! My friends laughed so hard! That's the only thing I wish was different---I wish the gas gauge would chime when it got down to the reserve amount in the tank. Just intermittently, not constantly. I am having trouble keeping the car under 80 mph! Love, love, love!