after over 13,000 miles Have had only one issue with this car, a sensor in the DEF system was bad other than that "O" problems. I am averaging 52-54 mpg. I live in Central SC which is fairly flat and around here I get mostly 54 and when I go to Western NC it drops to 50-52. This area is vey hilly to mountainous. I made a few trips to PA driving through NC and VA which is very hilly and still averaged over 50. I drove straight through last trip non stop 640 miles an still had almost 1/4 tank of fuel left. 700 miles on a tank is very doable (13.5 gal tank) There are times that the mpg in dash indicator will read over 60 mpg but is not sustainable. I do not use the mpg calculator to figure mileage, I do the math by filling to the top recording miles between fillups. Very happy with the car in every way except one and it has nothing to do with the mechanics of the car. The only ting I dislike is the hood is so low it is hard to judge distance when parking.