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Thread: 2005 6.0 Ford Diesel Mileage ???

  1. #1
    Liberator TJ1984
    What are you guys getting out there ???
    I am only getting 11 / 12 mpg. :cry:
    F250SD 4x4 3:73 gears 2dr ext. cab long bed , 305/75 R17 tires
    open exhaust > no Cat, No Muffler > straight 3" from turbo to exit
    @ 20,000 mi.

  2. #2
    rrrr
    Hmmmm. I know they're not the same, but my Exturdsion gets 16.5 in town average.
    Strange, I have a friend with a F350 CC dually. He is also running a straight pipe and getting 11 average. We have 2 F350 duallys here at work and they get around 15.
    You think the lack of back pressure might be causing the problem ?

  3. #3
    donzi22
    stock they get 15 to 18 on the hwy,do you also have a chip or programer to increase performance?

  4. #4
    victorfb
    get the led out. deisels are very sensative to rpm when it comes to fuel mileage. are you led footing it? thats the problem if so. in my f550 i see a huge mileage differance from 65mph to 70+mph. its all in the rpm. wether towing or empty, not much differance in mileage, but rpm makes a world of differance.

  5. #5
    Nubbs
    What are you guys getting out there ???
    I am only getting 11 / 12 mpg. :cry:
    F250SD 4x4 3:73 gears 2dr ext. cab long bed , 305/75 R17 tires
    open exhaust > no Cat, No Muffler > straight 3" from turbo to exit
    @ 20,000 mi.
    11-12 mpg
    F250 CC LB 4x4 3.73 stock motor/exhaust auto DR4.5" lift 315/70/17 tires 1600 miles.

  6. #6
    Senior Member
    Join Date
    Feb 2009
    Posts
    678
    What are you guys getting out there ???
    I am only getting 11 / 12 mpg. :cry:
    F250SD 4x4 3:73 gears 2dr ext. cab long bed , 305/75 R17 tires
    open exhaust > no Cat, No Muffler > straight 3" from turbo to exit
    @ 20,000 mi.
    u need to put a good muffler on it...something like the 3" Dynamax & as donzi22 says...put a chip in it...they should get around 15/18mpg on the hwy...most people i know that have the 7.4 diesel are getting that mpg or better & the 6.0 is supposed to be a much better mtr...just tinker with it a little...nothing to lose...just my .02 cents
    fastrat

  7. #7
    Liberator TJ1984
    I tried runing it in the Performance mode +155hp
    no difference in mileage to speak of , just alot peppier on the response , and alot more smoke
    was told it was not good to run in that mode all the time ? so I put it back to stock settings :sleeping:
    most is Hwy miles at 2200 rpm = 75mph+-
    A 3" Gibson open muffler is in the works

  8. #8
    victorfb
    damn, 2200rpm at 75+mph? thats low. ok so disregard the previous post, just shot that one out the water. lets hope the muffler works for ya.

  9. #9
    FILUCKY
    My old powerstroke got 18mpg and i drive like crap, 90 mph everywhere! But when i needed more power i had to go back to the old 460!

  10. #10
    Liberator TJ1984
    damn, 2200rpm at 75+mph? thats low. ok so disregard the previous post, just shot that one out the water. lets hope the muffler works for ya.
    yea Victor thats what I can't figure out, since I put it back to Stock settings , it is not adjusted to the tire ratio.....but at 2200rpm it is showing 75 mph , which would probably be right above 80mph corrected ???
    guess there is no set mpg by what you guys are posting

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