 I've owned this car since July 2011 and have over 64000 miles on it. My mileage has varied from a 35MPGlow to an amazing 56 MPG for a 15 mile trip. Average MPG for the life of the car until I changed tires this month was an actual 38 MPG. The car MPGgauge reads falsely high.My driving is 90% highway, though this is my daily driver. Like others, I had a check engine light issue when I first bought it and was reimbursed for my time and trouble by Hyundai. The mileage is very dependent on style of driving, speed (the slower the better). I really like the regular transmission over a CVT like the Honda Civic Hybrid I owned. 