when I got my 2013 brand new had to drive about 50 miles home. Noticed in the fuel economy mode it said averageing 11mpg. When I refilled the tank I'm getting 15mpg around town,23 on highway. I called the service department and the tech. said it takes up to 1000 miles before the pcm learns all the calibrations. What does yours say? Is it accurate or does it take time to learn? that makes it off by almost 25%. now 550 miles and still not right.