Bought the car last May, Great til Aug. On a trip when cruise went from 2400 to 6000 rpm. Happened 4 times. Thought the engine was going to blow. Highway gas mileage went from low 30s to upper 20s. Since 1-1-13 have avg. 31 in the city and 29 on hwy trips. Mazda says there is nothing wrong with the car. I live where its flat. Cruise goes into passing gear when going up the slightest incline. Again Mazda says thats normal and its saving gas by doing that. Service manager told me today that mpg hwy is only good up to 60. After that your mpg will decrease. Sky inactiv tech. Am going to try to see if Mazda USA can help but I guess it will be like hitting my head against a wall.