X15 Efficiency vs Performance

Discussion in 'Trucks [ Eighteen Wheelers ]' started by rjs, Jan 12, 2019.

Which X15 overall?

  1. Performance

  2. Efficiency

Results are only viewable after voting.
  1. MACK E-6

    MACK E-6 Moderator Staff Member

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    I have an X-15 in mine, and it does make a noise when pulling at around the 1200-1400 rpm range that I’ve seen some mistake for a rod knock. Maybe that’s what he’s talking about.
     
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  3. rjs

    rjs Bobtail Member

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    Mack do you have an efficiency or a performance?
     
  4. MACK E-6

    MACK E-6 Moderator Staff Member

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    Efficiency...
     
  5. otterinthewater

    otterinthewater Road Train Member

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    How you getting along with the nanny truck BS?
     
  6. MACK E-6

    MACK E-6 Moderator Staff Member

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    No cameras, just the one on the Bendix that reads the lanes and speed limit signs, which I have since learned to ignore. :laughing6:

    But the worst is the adaptive cruise control. I hate that. :mad:
     
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  7. otterinthewater

    otterinthewater Road Train Member

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    That lane departure thing goes off on virtually every on and off ramp. I hate it.

    The adapative cruise and the collision mitigation system are OK if you like going 45mph on the interstate and like the brakes slammed on. I’ve got a few insights to tricking them. I hate them.

    Only a forward facing company camera for me. Meh. Might as well hate it. :)
     
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  8. BCV

    BCV Light Load Member

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    May 26, 2018
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    I've seen 9-9.3mpg on 30K loads on my van but with 40-45K loads 7-8mpg. But, I do have the areo package and trailer tails.
    Truck set at 70 and has the double throttle pump passing gear that pushes it to 74. Climbs hills like a goat. Lots of torque.
    The only issue I've had is a bad coolant sensor w 180K miles. I'm not familiar w the loud vibration you're talking about.
     
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  9. mhyn

    mhyn Road Train Member

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    hey guys have you noticed x15 does not have 7th injector. the aftertreatment injector for regeneration.
     
  10. Goodysnap

    Goodysnap Road Train Member

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    Dosing for aftertreatment is done with the main fuel injectors, in cylinder on the exhaust stroke on the X15 for 2017. Same as the midrange product has been doing for years.

    More important that ever to monitor for oil dilution and overfull on engine oil. Oil sample often for excess fuel can pinpoint regen issues or faulty injectors early.
     
  11. mhyn

    mhyn Road Train Member

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    that was in my head. at every oil change oil analysis is needed. Interesting. it may affect lifespan of turbo and liners...
     
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