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Normal Oil Pressure

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mufflerbearing, Jan 16, 2018.

  1. Jan 16, 2018 #1
    Mufflerbearing

    Mufflerbearing Bobtail Member

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    Jan 16, 2018
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    Hello, I am a rookie driver who will be posting lots of rookie type questions. I have so much learning to do and I appreciate any input you all can offer.
    I work for a company that uses many different trucks. From Petes to Macks to Western Stars and more. I have to drive all of them when requested. There is so much to remember about each truck. One issue I struggle with is normal engine oil pressure. Everything I have read shows different values for different engine types and sizes.
    Is there a general rule of thumb for normal engine oil pressure? As in 10 psi per 1000 rpm?

    Not having much experience, I don't know when to know if my oil pressure is too high or too low other than remembering what the gauge typically states as I drive it and assuming that is the normal.
     
    Mufflerbearing, Jan 16, 2018
    Mufflerbearing, Jan 16, 2018
    #1
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  3. Jan 17, 2018 #2
    me myself and I

    me myself and I Heavy Load Member

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    vernon hills,Il
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    You're over think it. If you had low oil pressure, youll get a warning light. If you're still concerned look up specs for every engine youll be driving. There is no universal formula
     
    me myself and I, Jan 17, 2018
    me myself and I, Jan 17, 2018
    #2
  4. Jan 17, 2018 #3
    Dave_in_AZ

    Dave_in_AZ Road Train Member

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    You'll find they all are around 35ish normal operating pressure.
    If you see it go up to like 45 or 50, or down to 20, you have a situation.
     
    Dave_in_AZ, Jan 17, 2018
    Dave_in_AZ, Jan 17, 2018
    #3
  5. Mar 28, 2018 #4
    Mufflerbearing

    Mufflerbearing Bobtail Member

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    Jan 16, 2018
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    Thanks guys
     
    Mufflerbearing, Mar 28, 2018
    Mufflerbearing, Mar 28, 2018
    #4
  7. Mar 28, 2018 #5
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    Hesperia, Ca.
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    My Cat idles about 42 and a peak it runs 65 to 68. On a long pull when it get pretty warm, it will get down to 62.
     
    Diesel Dave, Mar 28, 2018
    Diesel Dave, Mar 28, 2018
    #5
  8. Aug 28, 2020 #7
    BigBoTrucker!

    BigBoTrucker! Bobtail Member

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    Aug 28, 2020
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    Just switched over to 2015 T680 with the Cummins, what's the norm for oil pressure for Idling and running at 1500 RPM
    I'm used to a C15 CAT in a 08 9400 international.
    Thank you in advance
     
    BigBoTrucker!, Aug 28, 2020
    BigBoTrucker!, Aug 28, 2020
    #7
    Slowrider89 Thanks this.
  9. Aug 28, 2020 #7
    A5¢

    A5¢ Medium Load Member

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    Oct 30, 2017
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    With your hopping from one seat to another, I would suggest using your phone to take pictures of the gauges, with cold /hot, low and high pressures. Do the same with the whole dashboard. I use my phone for a kinds of things like that.
     
    A5¢, Aug 28, 2020
    A5¢, Aug 28, 2020
    #7
  10. Aug 28, 2020 #8
    Brettj3876

    Brettj3876 Road Train Member

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    Gen rule of thumb most will be 45-70 ish range normal temps at highway speeds. And about half that when idle with a warm engine
     
    Brettj3876, Aug 28, 2020
    Brettj3876, Aug 28, 2020
    #8
  11. Aug 28, 2020 #9
    Brettj3876

    Brettj3876 Road Train Member

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    The idiot light will go off if pressure drops and shut it down before it hurts itself
     
    Brettj3876, Aug 28, 2020
    Brettj3876, Aug 28, 2020
    #9
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