I bought a 2010 Chevy Aveo Sedan brand new it's an automatic and I've had problems with the gas mileage ever since! The reason I even got the car was it's suppose to be good on gas it now has 15,076 miles and still no improvement and the dealer won't do anything about it they always say it's something I'm doing wrong! It's suppose to get 27mpg city and 35mpg hwy but mine gets 22mpg city and hwy! It sucks and as far as I'm concerned Chevy has lost my business!