@Requnix FWIW, I suffered with 22-24 MPG on my 2015 since almost day one. This spring I had to replace the rear brakes at about 25k miles because the pads literally fell apart without warning. After the brake change, my average mileage jumped to nearly 30 mpg! It has dropped somewhat since cold weather has arrived, but my mileage is still up 15-20% over last year. Coincidence? Dragging brakes? You might want to check it out.