Download an app called Gas Cubby. The MPG calculation in the dash is always a little more favorable than actual. Since I've got mine (2013 hatch, w/roof rack) I am getting 21.63 mpg over 4400 miles. My mpg calf says 22.3. Just calculate it yourself, and you'll see what I mean. But when I'm cruising around Denver on the interstate doing 55-70 I'm getting near 26-27 all the way up to 30-31 at times. The key is staying consistent.