Like everyone here has mentioned, it really depends a lot on your driving style and where you do most of your driving. When I really start to lay down the acceleration, I can drop down to 16mpg or lower, but if I cut back and drive a little less crazy, I can get up to around 18-19mpg. This is with a fairly equal combination of city and freeway driving in/around boston. (in a '98 LS) The car used to be my mom's, and with her driving style, she'd get 24+ mpg, even in the city.