specing a new 579 which engine? isx 15 or MX13

Discussion in 'Peterbilt Forum' started by usedboxman, Oct 17, 2014.

  1. joseph1135

    joseph1135 Papa Murphy

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    The Highway To Hell.
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    Im just going by my experience with the MX. I've had no problems with it at all.
     
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  3. usedboxman

    usedboxman Bobtail Member

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    Aug 15, 2012
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    Thank you for your advice. I m sure I would be ok with the MX motor too.. but I do not want to chance it after getting burned by the Maxxforce disaster...
     
    joseph1135 Thanks this.
  4. Simranjit

    Simranjit Light Load Member

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    May 15, 2013
    California
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    Cummins is the way to go. We ran cats since 94' and got a 2011 Pete 387 with a cummins isx 450 and a 2013 t660 same engine and hp both 10 speeds and both run exceptionally. The Pete has 450k on it and the kW has 300k never seen a repair shop and don't intend to either. Mpg is great on both
     
  5. Tlaine

    Tlaine Bobtail Member

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    Apr 1, 2017
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    So far the 2016 mx13 in my opinion is a boat anchor. It has no pull in hills fuel is 6 to 6.5 at best. Reminds me of a mack. Go with the Cummins
     
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