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Oil temp too high?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Msford, May 15, 2017.

Page 1 of 6
  1. May 15, 2017 #1
    Msford

    Msford Bobtail Member

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    May 15, 2017
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    I have a 2001 6NZ CAT set at 550. My oil temp stays at 200 unless I get into a hard pull. It will rise as high as 215 to 220. My water temp rus about 185. Engine runs strong, 6.2 mpg and no complaints. I'm told it's running to hot, and I should change my oil cooler. I change the oil every 12000 miles with Shell Rotella, and Lucas. Anybody have any insight, or history with this engine temp? Any help would be appreciated.
     
    Msford, May 15, 2017
    Msford, May 15, 2017
    #1
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  3. May 16, 2017 #2
    KeithT1967

    KeithT1967 Road Train Member

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    Low 200's is normal oil temp range. Engine oil actually MUST get over 212ish otherwise it builds up too must moisture from condensation. The more humid the climate the more important it is.
     
    KeithT1967, May 16, 2017
    KeithT1967, May 16, 2017
    #2
    Bean Jr. Thanks this.
  4. May 16, 2017 #3
    Roberts450

    Roberts450 Road Train Member

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    Those temps are fine on a hard pull. Hell my ISX runs 210-220 just normally and Ive seen almost 250 on a LONG HARD pull in the summer with outside temps pushing 100.
     
    Roberts450, May 16, 2017
    Roberts450, May 16, 2017
    #3
  5. May 16, 2017 #4
    Msford

    Msford Bobtail Member

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    I appreciate the feedback. I was just concerned, because I have two friends with the same engine, but their oil temp are running in the 165 to 175 range. I did a little research, and found the newer engines run at higher temps, but wasn't sure if mine fell into the category of newer.
     
    Msford, May 16, 2017
    Msford, May 16, 2017
    #4
  7. May 16, 2017 #5
    gokiddogo

    gokiddogo Road Train Member

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    I used to drive a company truck with a 6nz. It's oil temp always ran around 180-190. Big pull 220-230.
    Now I have a newer truck with 2015 isx. Flat roads oil is 220 or so, big pull 235-240.
     
    gokiddogo, May 16, 2017
    gokiddogo, May 16, 2017
    #5
  8. May 16, 2017 #6
    Msford

    Msford Bobtail Member

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    I sure appreciate your help. I definitely feel a little more at ease.
     
    Msford, May 16, 2017
    Msford, May 16, 2017
    #6
    S M D Thanks this.
  9. May 16, 2017 #7
    Yourawahoo

    Yourawahoo Light Load Member

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    The hotter it gets the better it will run. To a point.
     
    Yourawahoo, May 16, 2017
    Yourawahoo, May 16, 2017
    #7
    Big_D409 and FlaSwampRat Thank this.
  10. May 16, 2017 #8
    spyder7723

    spyder7723 Road Train Member

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    Yep but trying to figure out that point is the tricky spot. I always get nervous when it tops 220. But i honestly don't know where the point is that i need to back out of it. And talking to guys at detroit netted a bunch of "i don't know" answers.
     
    spyder7723, May 16, 2017
    spyder7723, May 16, 2017
    #8
  11. May 16, 2017 #9
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    Dump the Lucas. Just keep your intervals in check.
     
    Diesel Dave, May 16, 2017
    Diesel Dave, May 16, 2017
    #9
    wore out, spyder7723, AModelCat and 1 other person Thank this.
  12. May 16, 2017 #10
    Msford

    Msford Bobtail Member

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    I keep it pretty tight to 12000. This engine is like clockwork. It takes a gallon of oil between oil changes every time around 2500 miles before service. You're not a fan of Lucas?
     
    Msford, May 16, 2017
    Msford, May 16, 2017
    #10
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