[QUOTE Havent towed it yet, but cant wait, this thing is a beast and 19-20 mpg on hwy!![/QUOTE]

If you want to improve on it, tune it...or so I've heard.... :-)

If you want to improve on it, tune it...or so I've heard.... :-)[/QUOTE]

I havent heard much on tuners for the 6.7s?? Also dont want to void the factory warranty or blow up a motor by trying to get some more hp. Its pretty quick already..

Yep 13 is all I get . Love the truck it has ton of power will pull a house down and has a ton of zip but full mileage sucks. I have a 3.55 rear end in it. What rear end do you guys have in your trucks ?

I'm about right where you guys are with 13 towing (7000 lbs) and 18 or a little better in my normal commute. The mpg seemed to keep improving up to about 5000 miles. It has stabilized now and I've got about 7500 miles on it. It is my daily driver and I couldn't be happier. Probably the best all round vehicle I've ever owned. If I had my druthers I would have the large rear seat area of the F150 and take out some of the bed but I imagine that most of these are sold as work trucks and not toy haulers. Still compared to my 11 F150 eco boost it is quieter, has better window down airflow and lower noise (I ride with the windows open a lot), way (way way) more powerful and really is just plain more fun.

Congrats Nailit.

Dan

I just took mine to N. La. and I was travelling 75 for 2/3 of trip and 60-70 during the other 1/3. Averaged 18.5.. Mine has the 3.55 and has 44k miles on it. I did notice when I get more around town driving, its down to 15 and that's driving is cautiously as I am trying to save the tires.. This thing will spin them easily!

its definitely fun to drive and if I fart, I can crack a window and open rear sliding back window and it sucks it right out!!!! LOL

Haven't really pulled the boat on any long trip and since is getting cooler, I don't see that happening till spring.

power rear slider is a must, I have it on both of mine

I got to say, I'm a little doubtful of some of these numbers when you give them a hand calculated reality check:

http://www.fuelly.com/car/ford/f-250_super_duty

You can adjust based on which engine you're talking about but sure as hell nobody is getting 19-20 MPG on average.

I think a lot of people suffer from "I get 18 MPG" because they got it once, right after resetting the computer driving over flat ground at 50 MPH.

I checked mine against the computer on this trip. it was .7mpg over hand calculated several times as I drove almost 800 miles driving from New Orleans to Shreveport and back.
ok, so your right, I was actually getting 17.8 :-)

I havent really calculated the commute.. my problem is that if I drive like a paw paw, i do well, but I normally drive a lil more aggressive.. 78 in a 70 and usually 7 or 8 over any speed limit.

oh, that website is pretty cool.
Is anyone getting better mpg with a tuner?? Not too concerned as my fuel is paid by co.

That's kinda my point, one trip where you're maintaining a constant speed compared to a normal commute day, no way ppl are "getting" 18 MPG. An occasional high MPG is great, but rarely does it average out. My EcoBoost has seen 18-19 on highway trips in the winter, but that's not an accurate representation of the average.

The lie-o-meter on my dash (6.4L) has never been correct.......

Best MPG I ever saw on a trip was 22.3 MPG 6.4L (hand calculated) through the mountains on I-40 (with stock 18" wheels) Since I've upgraded to 20" wheels, I am in the 16-18 range on trips, and I've never checked it while towing...I don't want to know!!!! I am at almost 100k with only 2 issues on the truck, failed transmission temp sensor (28k) warranty claim, and a burnt up alternator (90K) on my dime.....

I know Spartan and H&S make tunes for the 6.7L - I have a family member who runs an H&S on his.....I wouldn't be worried about warranty issues, unless you are going to beat the crap out of it everywhere you go, and I have heard Spartan inserts info into the computer tracking history when returning to stock so it looks like regens (if that's what they call it on urea exhausts) have been occurring...

The "Boss" will not let me upgrade to a 6.7 yet....