What's your fuel mileage driving volvo 780 with volvo or cummins engine?

Discussion in 'Ask An Owner Operator' started by moblue, Oct 26, 2010.

  1. s140s

    s140s Bobtail Member

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    Jan 7, 2011
    Chicago, IL
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    Used to drive a 07 Volvo 670 - Cummins ISX 530, that thing would pass every single truck on all inclines and still average between 7-8.5mpg. Drove it with the speed limits 75mph in the states that allowed it. 750k miles at the time.
     
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  3. roadgypsie

    roadgypsie Light Load Member

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    Aug 27, 2009
    Fairbury,NE
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    Do all of you guys have apu's? I'm usually around 5.6-5.8 on mine but pretty heavy idle time
     
  4. oldbulger

    oldbulger Bobtail Member

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    Jul 15, 2011
    TEXAS
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    There are three important things that can really effect your engine operation and fuel economy.

    1. OIL: Make sure you not running too heavy of an oil. I'm a strong believer in Synthetic Oil. Run as light an oil as the manufacture will let you.

    2. FUEL CONDITIONER: Diesel fuel is pretty crappy. There can be a lot of junk in it. Use of a good fuel conditioner additive with every tank full will pay you dividends. Modern fuel injectors are real particular about getting clogged with foreign particles. Clean fuel injectors will give you more power, better fuel economy and perhaps fewer fuel injectors to replace.

    3. THE AIR CLEANER: Often an overlooked component of your engines breathing system. A dirty air filter will cost you. A really dirty air filter will really cost you. Changing that air filter every 90 days is not too much.
     
  5. moblue

    moblue Light Load Member

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    Aug 8, 2010
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    I'm now getting 6.7 to 6.8 loaded our empty at 58 to 62 mph. 10 speed ultra shift 3.42 rears. 06 d12 engine. Not too many hills. I use lucas upper injector cleaner every other fuel up and change oil every ten to twelve thousand miles. Was hoping to get even .5 mpg more. I see there are people getting that type of mileage.
     
  6. oldbulger

    oldbulger Bobtail Member

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    Jul 15, 2011
    TEXAS
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    If you switch to synthetic oil, you can extend your changes to 25,000 miles with no problems. Just change your oil filter every 5 to 7 thousand miles. Synthetic oil does not break down like regular oil. Synthetic oil is not effected by heat or cold.
     
  7. trustno1

    trustno1 Bobtail Member

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    Jul 2, 2008
    phx az
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    I average 6.5 to 6.9 on my 05 volvo 670 isx doing 75m.p.h driving midwest to Cali pulling 40000#
     
    WildRose Thanks this.
  8. Dryver

    Dryver Road Train Member

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    Nov 30, 2008
    Sioux Falls, SD
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    Idle = 0 mpg. Its killing your profit is you L/O or O/O.
     
  9. TruckerGsch

    TruckerGsch Medium Load Member

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    Dec 12, 2010
    NJ
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    You would think if they can get a car to go 40 miles per gallon they could get a truck to go 10 to 15 per gallon.
     
  10. gerardo1961

    gerardo1961 Road Train Member

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    Feb 21, 2010
    miami
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    The truck exist-Scania v8-730hp with 97000 -12mpg,Mercedes and more European trucks have a mpg 11 up
     
  11. Dryver

    Dryver Road Train Member

    2,818
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    Nov 30, 2008
    Sioux Falls, SD
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    Yep, but arn't they restricted to 54mph? The sleepers are only about 30 inches from the back of the drivers seat to the back wall of the cab. The UK gallon measurement is larger than a US gallon, odd but true.
     
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