I average high-20s. On the highway once, I calculated ~31. Of note, I had a Civic DX hatchback, automatic as well, and I never got over 30mpg in this car, and averaged 26mpg, even with clean air filter and new plugs, and Mobil 1 5w30. One of the first comparisons I noted when I bought the C a year ago was that the mileage was better than the Civic.