I am getting very poor mileage and the dash doesn't even calculate the MPG accurately. I fill up full tank every time and reset the trip odometer and calculate the MPG on a calculator. The highest MPG my Ascent every registered is 16.2, and that is combined. That is more than 25% lower than the advertised MPG on the sticker. The car has over 1000 miles, no improvement.\nAny other Ascent drivers checking MPG? Feedback?