Tow/Haul Mode (is it needed in my case)

malechi wrote:
I have a 2008 Ford F-350 6.4L V8 diesel (my first diesel truck). With it, I tow a Starcraft Autumn Ridge 197FBH which had a GVWR of 6200 lbs. I also live in Colorado. My question is should I use the tow/haul mode on the truck? I ask because my MPG reading on the truck is about 9MPG on average with I use it. I'm still pretty new to towing too. How do I know if I should use that mode or not? Please help.

I just traded a 2010 F450 with the same engine. I hauled the camper in my sig which weighs about 5500 lbs. I never noticed any significant difference in the MPG using tow/haul or not. 9.0-9.5 is what they get when working them. Of course, mine had the 4.30 rear end, so I would occasionally even see lower than 9.0 if it was working really hard.

I wouldn't consider MPG when deciding to use tow/haul or not. It really doesn't matter whether it's on or off when cruising at hiway speeds on level ground. It changes the way the tranny shifts when you are on hilly roads, starting from a dead stop, and assists with braking when going downhill. Those are all good things when towing or hauling.

It does NOT lock out OD. It just changes (for the better) when it goes into, and out of OD.

:):)