My Ford Super Duty 1999 F 250 is rated for over 12,000 lbs. I used to tow a 28 ft fifth wheel to New Hampshire and back. Western Maryland and parts of West Virginia were slow going. I'm at 400,000 miles now on the 7.3. Replaced the cam sensor & 1 injector so far. I had a 24' PJ for 14 years...