I know this may sound dumb, but are you resetting the DIC after each fill up?
I have found that driving 60 to 65 gives me better MPG than 70 to 75 and even 50 to 55. The engine seems to be designed for 65. Of course using the AC, how hard you accelerate, is the tranny goinging into sixth, all play a major factor in the MPG. I have gotten as high as 27 on the highway but usually I am around 23. In the city I am around 13 to 14 as there is not much freeway traffic here, mostly stop and go. I have found that the main problem with my MPG is me and my driving habits. My wifes Aura that has the same engine and tranny gets better mileage than me because of her better driving habits, unless of course she is late for work.
I have found that driving 60 to 65 gives me better MPG than 70 to 75 and even 50 to 55. The engine seems to be designed for 65. Of course using the AC, how hard you accelerate, is the tranny goinging into sixth, all play a major factor in the MPG. I have gotten as high as 27 on the highway but usually I am around 23. In the city I am around 13 to 14 as there is not much freeway traffic here, mostly stop and go. I have found that the main problem with my MPG is me and my driving habits. My wifes Aura that has the same engine and tranny gets better mileage than me because of her better driving habits, unless of course she is late for work.