Getting Better Fuel Mileage

Discussion in 'Trucks [ Eighteen Wheelers ]' started by maxeffort, Apr 23, 2008.

  1. SPIKE 64

    SPIKE 64 Light Load Member

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    Feb 26, 2008
    San Antonio tx.
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    My buddy has the same set-up as yours on a 01 Western Star exept for the rear's he run's 355's,He was also in the 5.5 MPG range and after he changed to free-flow mufflers and an overhead run he started seeing 6.2 MPG's.average.Hope this helps .
     
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  3. sano

    sano Bobtail Member

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    Sep 24, 2006
    Indiana
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    Likewise, if you assume:
    1) You run a constant 800 mile journey (at $1.30/mile)
    2) You work 11 hours per business day, all year

    Truck #1 goes 75mph and gets 5mpg will net about $64k
    Truck #2 going 55mph and gets 7mpg will net about $92k.

    Truck #2 will make 70 less trips, but the money saved overcomes the potential losses in work. Is my math correct? This seems like quite a bit of coin.

    Math: http://spreadsheets.google.com/pub?key=pxySm17dAJc_-FJrSGVllcw (comments appreciated)
     
    Last edited: Jul 19, 2008
    Drive55 Thanks this.
  4. 550hpW900L

    550hpW900L Road Train Member

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    Jan 29, 2008
    norcal
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    Yes! You will make more especially after the customer cuts your rate because the produce is 24 hours late :biggrin_2559: No such thing as 55 in the late night chicken flight business!
     
  5. 24valve puller

    24valve puller Medium Load Member

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    Sep 8, 2007
    N.E. Oh
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    there are two things holding fuel economy back on these trucks, Only being 460hp and that piece of junk 10 speed. there are just too big of jumps between the gears and only one overdrive gear
     
  6. WiseOne

    WiseOne Inactive contact bullhaulerswife

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    Feb 8, 2004
    Truckers Report, TN
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    EXCELLENT informational thread you all! This is one of the best threads I have run across to be sure. I am sure a lot of people will find this information extremely useful these days. Thanks!
     
  7. Xcis

    Xcis Medium Load Member

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    Jul 9, 2008
    Bridgeport, Pa
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    If you do a search for "cat driving tips LEHT7296.pdf" you can get a list of driving tips for improved fuel economy directly from the Caterpiller web site. These should be adaptable to any engine if you can find out the rpm range that produces the maximum torque.
     
  8. lostNfound

    lostNfound Road Train Member

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    Jun 28, 2007
    Home of the Stampede
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    There are also white papers from Kenworth and Cummins (readily available on their websites) that discuss various fuel mileage strategies and theory.
     
  9. MedicineMan

    MedicineMan Road Train Member

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    Woodville, TX
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    ya I have a cd here from cat on driving technics and they tell you to lug it down to 900 rpm
     
  10. 550hpW900L

    550hpW900L Road Train Member

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    Jan 29, 2008
    norcal
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    LOL i guess they want you to put new rods and mains in yearly. Also new U joints and bearings in the trans. :biggrin_2559:
     
  11. MedicineMan

    MedicineMan Road Train Member

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    Jan 13, 2007
    Woodville, TX
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    it's funny. it even says "go ahead an let it run down, you won't hurt this motor!" :biggrin_2551:
     
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