You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Ford-Trucks Forums community today!
I own a crew cab with the 3.73 diff. When I bought the truck, we went on a bit of road trip (800 miles) to break it in. I was extremely pleased when the lie-o'meter said 15.5 mpg. Since then, it's gotten progressively worse - around 11 mpg. I towed a trailer last week on a short haul and only got about 7.5. I had the PCM re-flashed today (TSB 10-21-13) and am hoping that the mileage improves.
My highway mileage today, pulling my tandem axle, 9000 lb, 36 foot travel trailer with a 15-20 mph tailwind was 8.1 on the lie-o-meter. I have found it to be no further off than .2/10ths of a mpg compared to hand jam figures. Still baffles me reports of owners getting 12+mpg pulling heavy loads.
I have F350 CC flatbed 4.30 gears , at 3000 miles was getting 12.4 at the most around town. I drove to Oklahoma this weekend with a polaris RZR on the back with a windshield
on the rzr, it was like having a wind dam on the back not to mention a constant 30mph head wind. I was gstting 11.7 by the time I got home, I was hoping the lie meter would go up fron 12.4 , but it didn't. Leaving for MD next week pulling a 30 ft lite Dutchman travel trailer. I'll get back to you on how that turns out.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.