My 2013 had 17K miles and I did my first long tow. 1250 miles from Texas to California pulling a 6x12 tandem axle U-haul trailer moderately loaded. First 200 miles average was 8.8 but started getting better. Ended up at 12.6 overall for the trip. 900 miles down I40 @ 75 and last 350 in CA was 55-60 MPH. Will post back later this week on return trip with no trailer.