6.0 Towing mileage?

[2005F250]

I'm starting this thread to see what kind of fuel mileage you other 6.0 guys are getting while towing. I currently get 8 MPG towing a 6000lb toybox. Stock tuning with just an exhaust and I'm taking it easy. I know it can be better and it has been in the past. I once got 14.7 MPG towing the same toybox when the truck was a year old I just wanna see what you guys are getting because the truck goes into the shop this week and I want to know what to expect after I get it back. And PLEASE be HONEST about your mileage. Please give the actual mileage you get.

[f250ghost]

Honestly, I don't know how, but my mileage went up when I put on the bigger tires...and yes the spedo is right on.

[2005F250]

Okay who gets 17-18 while towing?

[07OUTLAW]

I voted............13-14 for me. Thats pullin a light little sled bed with a few toys on it, maybe 2000 pounds.

I voted 13-14, but have seen almost 17 through a tank though, it all depends on terrain for me.

I've only pulled heavy a few times, and didn't bother figuring out mileage, I'm sure it sucked.

[Goose350]

I voted 11-12 and thats pulling a 8ft trailer with a 4wheeler.... I know its horrible

[fordfan30]

I see anywhere from 9-12 with my 7500# tt. with my mods

[TNACUSTOM]

I got 10 towing 15,000lbs. over a pass with a 6% grade. Stock with no mods. I 14 in town 18 on the hiway. It's a 06 crewcab with 18's I check mpg every tank by hand.

[bismic]

I have gotten between 11 and 12 on the highway as an average - the best I can tell. I generally will not go past 65 mph, and will probably stay just under that. My trailer is apprx. 6500 lbs. and my loaded truck is apprx. 9000 lbs. Stop-and-go driving while towing is a HUGE killer on fuel economy and I am taking that out of the number I posted. Also, the wind resistance (if you are facing anything over a 10+ mile an hour headwind) and elevation changes will cause these numbers to drop like a rock . My electronic mpg gauge is not accurate, but it appears consistent. It is ALWAYS 1.1-1.4 mpg higher than actual. On long trips, several times I have reset it on the highway and tracked the fuel economy on flat stretches with minimal wind.

My numbers are using the tow/haul feature while towing AND it seems that the best economy is without cruise control (unless the terrain is very flat). Cruise control will throw the fuel to it as you climb hills. Now, I try to gradually speed up before a hill and I do not mind a few mph drop during the climb.

That being said, when you are in a hurry it is great to have the power for high speeds, climbing hills, etc. It is just at a big fuel penalty.

[magnumpeei]

11-12 pulling a 12-foot single axle closed trailer. that's also averaging 65-70 mph, so i don't complain.

[Dave]

I get about 15 towing 7k