Fuel MPG on 379exhd 2003 6nz engine

Discussion in 'CH Robinson' started by peterbuilt fan, Dec 16, 2011.

  1. peterbuilt fan

    peterbuilt fan Bobtail Member

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    Dec 16, 2011
    philadelphia. pa
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    can someone help i like to buy 379exhd 2003 6nz engine ,what is the empg
     
  2. dave26027

    dave26027 Road Train Member

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    Sep 10, 2009
    Dallas, Texas
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    Can you help us out- what kind of trailer will you be pulling? How much weight? What kind of roads- hills or flat, heavy city traffic, country or city? And how are you geared- what rear end ratio are we talking about and what kind of transmission?

    You'll likely find someone in a similar setup that can guide you.
     
  3. peterbuilt fan

    peterbuilt fan Bobtail Member

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    Dec 16, 2011
    philadelphia. pa
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    18 spd 550 hp 3.55 ratio 53 ft refer going west pennsylvania wisconsin south almost everywhere
     
  4. peterbuilt fan

    peterbuilt fan Bobtail Member

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    Dec 16, 2011
    philadelphia. pa
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    i forgot weight around 40000-45000 lb
     
  5. apyles

    apyles Medium Load Member

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    Oct 21, 2011
    Newbern,Tn
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    The main question is what speed do you plan to run? What are your driving habits? What kind of shape is the truck in? How many miles are on it? Need alot more information, very detailed. There a lot of different factors, that will affect the mpg of a 379, but overall all, just for "very"general info about,5.5 to 6.0. Driving style,experience ,habits,equipment condition and EXPERIENCE will play a major role. I have talked to some that are getting 6.8 mpg with a 379, but these are VERY seasoned O/O.
     
  6. dave26027

    dave26027 Road Train Member

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    Sep 10, 2009
    Dallas, Texas
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    Hmmm... 48 states with a big engine. I've driven a similar setup years ago and drove my equipment hard. My best guess is to be pretty conservative about fuel mileage (in other words don't expect good results), I would feel comfortable with 4.8 to 5.8 mpg's. That would depend on a lot of variables, idle time being the biggest factor. If you end up with one of those over gross nursery loads out of Oregon and it has to cross the country in a hurry to deliver to Boston, (lots of weight and moving fast)- shoot even lower.

    Light loads, no idle time, slower speeds= better mpg's than expected.
     
    peterbuilt fan Thanks this.
  7. peterbuilt fan

    peterbuilt fan Bobtail Member

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    Dec 16, 2011
    philadelphia. pa
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    ill say 5.5 - 6 mpg is okay when ill have my baby going singing on the highway thanks a lot guys and merry christmas to all
     
    dave26027 Thanks this.
  8. jimvrg

    jimvrg Medium Load Member

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    Jan 11, 2012
    yellville arkansas
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    i use to get 6.75 to 7.25 driving 68mph hauling reefer theres alot of factors.rpm when shifting ,down shifting plays a big factor in this also 05 pete c-15 cat ,18 speed
     
  9. mike91118

    mike91118 Medium Load Member

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    Feb 9, 2010
    clarksville,tennessee
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    Try putting a Pittsburgh power box on it
     
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