Those numbers sound a little overrated lol. I have a standard cab 2wd auto 7.3 with DS Predator 120 program S&B Air system, and straight pipe I can get around 17-20. Now with 35's same mileage, you must not be pressing the diesel pedal very much lol

_________________
2332cc Air Cooled Screaming Meanie. Predator Singleseat.

"Lets go get stupid"

My 6.0 F250 w/ 3.73s gets 17 empty if I stay about 65 mph.
But put about 10,000# or more load on either of them and run interstate speeds up n down hills, and I'll bet there aint a nickels worth of difference in mpg in none of them. You get some who exagerate, but most people I ask at fuel stops tell me from 10-12 pulling big trailers or campers, whether its a Cummins, Japdiesel (Duramax Isuzu), or Powerstroke.

Does your buddy have a new 6.4? If not, he might have something wrong. I aint never heard of a stock 6.0 or 7.3 get that shitty of mileage unless its driven like its stolen. I talk to a BUNCH of Powerstroke owners. I ask every one that comes in the shop that I get the chance what kinda mileage they get. All the 6.4 owners aint happy at all with their mpg. Some early 6.4 owners were saying they figured around 10 mpg empty hiway . Here lately most say 14-15.

_________________
If it feels good, hold it to the floor and pour it to it!
http://www.dandkoff-roadpark.com/FORSALE.html

Mine get around 17 mpg overall (driving to work and back) about half backroads and other half highway driving. I can get around 20+ mpg sometimes on the highway non-stop not pulling anything and about 12-13 pulling my box trailer. I am very happy with my Powerstroke and I don't think that it is bad mileage at all for a 1-ton ext. cab, long-bed 4x4 pickup that weighs 7600 lbs.

_________________
"Loud pipes saves lives"

Kyle may be right, you will have to drive it very light to accomplish that kind of mileage, I know that they produce tons of power, but I bet if you pull 10,000 lbs down the highway it will make your EGT go up very high depending on what setting you're on, the thing about the Cummins (depending on what year) is once you get a set of injectors put on, fuel plate on the pump, and the turbo size. You cannot change your style of driving on the fly like the newer ones can and you will have to adjust your fuel plate everytime you go from towing to normal driving everytime if you don't want the high EGT. Like I said before, there are many possibilities that you can have to make your truck run the way you want it, I just simply created my own tunes and load them into the ECM and can make the ECM communicate with my Edge module (almost like it is stacked) I also re-programmed the Edge as well to work with my tune in the ECM and make it work like I can change the setting on the fly without turning the truck on and off to re-program the ECM everytime. I did this because it was way too much difference of performance settings so I took the rocky top and made it a little smoother throughout the settings.

_________________
"Loud pipes saves lives"

I think yall must turn your trucks off and coast down hills to get 14 or even 17?? I get 11 mpg not loaded, I get 10 when I pull anything over 3000lb. 10,000lb 8mpg.

Do you have a F-450 or F-550? if you do, you may have 4.30 or 4.88 gears and that will lead to high rpm on highway driving and there goes your mileage, it will go down quick.

_________________
"Loud pipes saves lives"

f350

Dually? If it is, it may have 4.10 gears then, very rare that I seen a dually with 3.73 gears. What is your rpm's when you go 65 mph?

_________________
"Loud pipes saves lives"

your right bruce sounds like a good fish story 17 mpg come on guys

_________________
i dont always ride my buggy but when i do im glad it has a bad ass bow tie makin the horsepower

Jesus loves me, but everyone else thinks im an asshole.

Our Lady of Blessed Acceleration, don't fail us now!

Kyle may be right, you will have to drive it very light to accomplish that kind of mileage, I know that they produce tons of power, but I bet if you pull 10,000 lbs down the highway it will make your EGT go up very high depending on what setting you're on, the thing about the Cummins (depending on what year) is once you get a set of injectors put on, fuel plate on the pump, and the turbo size. You cannot change your style of driving on the fly like the newer ones can and you will have to adjust your fuel plate everytime you go from towing to normal driving everytime if you don't want the high EGT. Like I said before, there are many possibilities that you can have to make your truck run the way you want it, I just simply created my own tunes and load them into the ECM and can make the ECM communicate with my Edge module (almost like it is stacked) I also re-programmed the Edge as well to work with my tune in the ECM and make it work like I can change the setting on the fly without turning the truck on and off to re-program the ECM everytime. I did this because it was way too much difference of performance settings so I took the rocky top and made it a little smoother throughout the settings.[/quote

wasnt tryin to start big deal about numbers just comin back from the f... cummins note*. i dont drive easy and i dont build my truck for fuel mileage right now im puttin a compoud set up on hx35 and ht3b which is a good set up for good performance gain but still be able to pull w/o high egt's, to each is to there own...just tryin to bust some balls there's good an bad about all jus havent heard good w 6.0's theyve had inj prob., head gasket prob, wire harness prob, turbo prob.

on a side not, (any truck guys thats interested) my buddy's shop has a dyno and sometime this fall me and a few ppl that pull are gunna rent it for the day, if ne one is interested in puttin there rig on the dyno an c n what its got or do a lil tuning... i also thought if we could get enough buggies to rent it for the day, i talked to him the other day an a quad shop rented it an dyno'd an tuned 4 wheelers all day..

That sounds good about the dyno deal, I am not not trying to bust anybody's balls either, just saying the facts that I have seen so far. Brett, I have personally seen diesel trucks get great mpg, it all depends on how it is setup and the way they drive it and also have seen some good trucks get way worse mpg than others. Mine started out getting 14-15 mpg stock and now gets 17 overall, it took me a while to accomplish that.

_________________
"Loud pipes saves lives"

yes, ? , I will check, but who runs 65?

I have a 6.0 in an f-350 dually dump with 4.10 gears and can get 13mpg empty on the highway and 10 with any load or trailer. I regularly tow 15k pounds and it still gets 9.5 or 10mpg. I also think I'm loosing injectors or injector seals now at 53k miles. Its planned to go to the shop soon. I have some rough starting on cold mornings, rough idle until its warm and an occasional turbo flutter noise when its cold and I let off the pedal while under boost. I had a '99 7.3 and wish I could have it back sometimes.

_________________
"Obstacles are those frightful things you see when you take your eyes off your goal." -Henry Ford

When mine was brand new it got 14.5 to Florida and back. F250 4x4 4 door shortbed w/ 3.73s. When it got about 23,000 on it two years later, it got 15.5 to Florida and back. No trailer, cruise on 65 (which is actually about 63 in my truck). I was told by the guys in the deisel shop at work the mileage would increase a little when it hit about 20,000 or so, and it did. Then after programmer and Banks intercooler , turbo lines, intake elbow, and removing the cat it will get 16 to 17 every time empty. I can get 11-14 mpg to D&K and back pulling 35' enclosed gooseneck w two buggies in it and one a trailer behind it. Even a 5 mph speed difference greatly affects it, and if its a bad headwind with that trailer I can tell the difference in mpg just lookin at the gauge when I pull into Darrell's.

Yankee just drove his '01 dually 120,000 or so miles on it ( 7.3 auto, 4.10's, 4 door 4x4) to New York and back and got better than 15 mpg.

No BS'in Brett, 14-17 is very realistic in a newer diesel truck. I got no reason to try to brag on my truck, I'm pretty pissed at my 6.0 right now! Its fixin to find a new home soon as I can get my ducks in a row.

Brucie, you keepin your fuel filters changed every other oil change?? My mileage suffers quite a bit when I skip it a time or two. Your truck was a cab n chassis when you bought it, wasnt it? (No bed) Its very likely to have some steeper gears in it.

63 mph lord no wander KOKO calls you grand-paw. You drive like one. How long did it take you to get there? 3 days? Speed limit in Ga is 90. When I come to D&K I set the cruise on 87 and let her roll.

Last time I checked I was getting 15-17 with my 12 valve (370hp marine inj. no fuel stop plate) and it cant be driven with out black smoke pouring out

_________________
Travis

I can guarantee 17-20 out of mine unloaded. 27 gallon tank and I can go right close to the 600 mark!

_________________
2332cc Air Cooled Screaming Meanie. Predator Singleseat.

"Lets go get stupid"

If $100 bills flew out my ass every time I sneezed (like you) I would drive faster.
I save $$$ where I can. We aint all got good Mexicans to do our work for us!

It took me about an hour longer than when I would drive a car at about 75-80 mph. And prolly saved $50 in fuel. I'll take $50/hour for sittin in my truck.

I can hook you up!!!!!!

how come everybody on here is either had it in the shop or taking it to the shop or had to modify it to work right. what do they all have in common besides being junk,ah that's right this is a topics on ford's, my bad.lol .chad . p.s. I LEARNED IT BY WATCHING YOU. (kyle)hahahaha lmao

_________________
NOW GAS IT!!!!!

I'm not convinced the duramax is any better. I just had a guy leave the house with a nearly new 2500 with the duramax and allison and he said he can't get better than 13 empty. I thought they were getting close to 20 but he said its not even close.

_________________
"Obstacles are those frightful things you see when you take your eyes off your goal." -Henry Ford

well guys im glad to hear others out there get good decent mileage also and i like how everyone that gets crappy fuel mileage always gets on the defensive side when we say what mpg we get...

This aint about gas burners but here goes anyway,,,my 97 chevy with 454 got 13 no matter what ,,load ,,interstate,,around town ,,didn't matter,,,the 04 6 litre gets 11 acording to the built in mileage computer ,,,but I think it is better around town but not as good under load,,,,so,,,,,I don't know

_________________
If your clutch ain't slippin,, you probably got it adjusted right!!!!!