This is good to know. I have recently purchased a 2017 and have logged about 3,500 miles in just over a month. Mileage definitely gets bad when it regens...5-7 MPG for about 20 miles. I have noticed that it seems to do it more with more city/stop and go driving. other than that the worst tank I've experienced was 17.5 and the best 21.5...trailering a 2 horse trailer (~7500 lbs) from Atlanta to Panama City, Florida I got 11.5, beats the heck out of my 2002 F150 at 12.5/15 and 8 pulling the same trailer. Do the regens stop at the recommended 6,000 mile breakin?