379 Bad Fuel Mileage

Discussion in 'Peterbilt Forum' started by Go_Trucking, Jan 6, 2013.

  1. bubbanbrenda

    bubbanbrenda Road Train Member

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    Feb 27, 2011
    Middletown,Oh.
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    Really? Mine must be broke I get 6.7 with no idle 6.0 if I idle or use my pto to unload.'05 "BXS Acert 475/1850 with 1,042,000 miles on it.
     
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  3. Savingtheworld

    Savingtheworld Bobtail Member

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    Jan 19, 2013
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    Hi Guys, new to this forum so just a little about myself, been in the trucking industry for past 10 years controlling the fuel and monitoring usage etc and helping improve mileage. As long as the truck is performing optimally the only other way to improve mileage is fuel saver oil. This is something our company is currently testing. It's been 2 months o testing so far and it's looking positive. We are saving between 15-25% on fuel costs. Though final results will be released after the end of our 3 month trial. Per truck this is a weekly saving of around $130 and per year around $6500. That's after the cost of the performance oil. For us we have 45 trucks so it adds up. Is there anyone else using diesel based performance oil? Feedback would be great to see what worked for you? Any negatives to watch out for?
     
  4. screamin eagle

    screamin eagle Light Load Member

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    Apr 18, 2009
    texas
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    My acert C 15 I had used to get between 5.1 to 5.8 depending, and I drove the H3ll out of it.
     
  5. mc8541ss

    mc8541ss Road Train Member

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    Sep 22, 2007
    Lower Alabama
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    Savingtheworld the feedback is that you sound like a snake oil salesman and you are full of crap!
     
    Last edited: Jan 24, 2013
  6. generallee

    generallee Medium Load Member

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    Jan 4, 2014
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    03 Pete 379EXHD with the 6NZ 550HP 13 speed 3.55 gears Straight pipes extremely good oil pressure and regularly serviced and I do 6-6.5 depending on load and terrain etc.
     
    milskired Thanks this.
  7. Buckleup

    Buckleup Bobtail Member

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    May 28, 2015
    Charleston sc
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    I have a used TMC 07 379 pete , c15 acert 475 hp, after 10,000 miles at 65 mph loaded one way and mty back 400 miles per day , it gets 6.58 mpg. i'm very pleased. Fuel is cheaper where i unload, thats where i fuel up .
     
  8. kilz

    kilz Bobtail Member

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    Apr 4, 2018
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    change dual fuel return valve under cab.replace fuel tank vents> have you had your over head adjusted? connect to reader. is your idle time 50% or more of your total time? right size tires? PPMS set in ECM?
    any leaks at CAC? speedometer calibrated correct? does it have a miss fire?
     
  9. RustyBolt

    RustyBolt Road Train Member

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    3,334
    Feb 21, 2015
    Bement, IL
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    Y'all realize you're replying to nearly 5 year old thread?
     
    pushbroom, spsauerland and AModelCat Thank this.
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