my 99 powerstroke gets 23mpg my o6 6.0l gets 11.48 highwaymiles no trailer its crap  

that sux... u need to take it in before the warranty goes out and ask them what is the deal... it sould be way more then that. at the very least it should be 15  

my 01 psd been getting like 14.3 with the cold wheather we were having  

my 94 gets up to 24mpgs and planning on getting better when i put in a set of 3.08 gears and some programing.  

I GET 16MPG IN TOWN AND GET 25-27 ON THE OPEN ROAD,I HAVE A 2006 6.0 WITH A CREW CAB AND A 6.5 FOOT BED MY WEIGHT IS 8400 LBS THIS IS A F350 HIGH LINE WITH A 4 INCH LIFT KIT FROM THE FACTORY WITH 18 INCH RIMS AND 285 70 R18 WHEELS
I ALSO HAVE THE RANCHO SUSPENSION AND IT IS A FX OFF ROAD WITH FULL SKID PLATES.  

wr350: mine is the 05/350/dually, long bed, crew cab with 4.10 gears and get best 14.5 - 14.9 mpg empty combined,manually calculated form tank to tank with now 26,000 miles. All stock. What have you done to do so good?  

I have an 07 with 3:73's and 35" tires. I get about 8 mpg pulling my toy hauler. I've been told that if i change my gears to 4:11's that my mpg will increase because of the tire size. Can anyone clarify this for me?

Thanks

Dale
Anchorage, AK  

i wouldnt do it 3:73 is a good all around gear unless you are towing that trailer every weekend.  and the 4:10 gear is gonna hurt your mileage when you are just driving around empty due to the higher rpm's you will be running. dont get me wrong the 4:10's would make it pull a little better but i wouldnt see it making enough diiference to fit the bill of having to get both axles regeared(assuming you truck is 4 wheel drive). im running 35's on my truck as well and pull a 32' fifth wheel and i get 10-12 mpg with mine as long as im not pouring the coals to it goin up a big hill or something. you should just llok into a tuner, good 4" turbo back ex. and air intake that would help you out a lot. and as far as the guy claiming 25-27 hiway im goina have to throw the B.S. card id have to see that one to believe it.  

Yea. That's what I thought. I gotta get the tuner and air for sure. I would be estatic at 10 to 12 mpg. I usually run north up towards Denali so there are a few hills to climb so that hurts a little.

Thanks for the quick reply!

Dale  

no prob man need any help just hit me up i been doin a lot of research for the 6.0 tryin to find ways to liven it up and not blow it up at the same time.  

I'M GETTING 15.5 MPG OUT OF MY 99 F250 I DRIVE LIKE A MAD MAN & THE A/C IS ALWAYS ON, BUT I DON'T PULL OR TOW!!  

thats still pretty decent mileage considering where you live and how much traffic is down there  

Yeah, gun, that's a lot better than what I'm hearing from these 6.4 owners. Those things guzzle like there's no tomorrow, from everyone I've heard from.  

esanchez:
Yeah, gun, that's a lot better than what I'm hearing from these 6.4 owners. Those things guzzle like there's no tomorrow, from everyone I've heard from.

Like you wouldn't believe    

hell im yet to hear from anyone that gets good mileage in any of the new trucks. doesnt matter what it is.