One of the reasons I bought my 2012 Mazda3 hatchback with Skyactive was the expected gas mileage. I check it every fill-up and am only averaging about 28mpg with mixed interstate/city driving. I never encounter stop and go driving and the terrain is mostly flat. My best highway-only result was 35 mpg. With other cars I have owned I can usually get better mileage than the estimate. The other issue I have is power delivery. When excellerating from a slow speed or passing the car hesitates for a full second before shifting to a too-low gear. Thank goodness there is a manual shift mode that works well. Don't expect to get 39mpg or Zoom-Zoom with this car. It has neither.