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Another Oil Question

Discussion in 'Early CJ5 and CJ6 Tech' started by haighfam, Jul 18, 2017.

  1. Jul 18, 2017
    haighfam

    haighfam Member

    Paradise, CA
    Joined:
    Feb 8, 2009
    Messages:
    368
    I've done the search and have settled on Shell Rotella F1 straight 40wt. It's hard to find, Tractor Supply is the only source near me. I can find the Rotella F4 15w40 everywhere. Benefits or drawbacks to either one. I'm changing the oil pan gasket so now is the time to change oil. Was running Castrol 10w40. Want to switch to a diesel oil as suggested for the flat tappets.
     
    haighfam, Jul 18, 2017
    #1
  2. Jul 18, 2017
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,375
    I prefer 15w40 since it flows a little better when cold.
     
    Glenn, Jul 18, 2017
    #2
  3. Jul 19, 2017
    djcj3a

    djcj3a Member

    Ukiah, CA
    Joined:
    Jan 12, 2010
    Messages:
    206
    The new CK4 diesel oil isn't much different than any of the other automotive oils nowadays. If you're worried about your flat tappets, you would be better off running a break in additive every oil change than trusting the new diesel oils.
     
    djcj3a, Jul 19, 2017
    #3
  4. Jul 19, 2017
    Tom_Hartz

    Tom_Hartz Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    North Carolina
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    Apr 9, 2014
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    I run Racing Valvoline 10/30 for the high zinc content.
     
    Tom_Hartz, Jul 19, 2017
    #4
  5. Jul 19, 2017
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Hills of NH
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    Aug 3, 2003
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    PeteL, Jul 19, 2017
    #5
  6. Jul 19, 2017
    Howard Eisenhauer

    Howard Eisenhauer Administrator Staff Member

    Tantallon, Nova...
    Joined:
    Nov 22, 2003
    Messages:
    8,118
    I think you'll be fine with the 15W-40.

    We can argue oil all day but Rotella has a good reputation for the zinc/tappet issues and is at the very least known amongst all sorts of people who run old engines *not* to do any harm to them.

    H.
     
    Howard Eisenhauer, Jul 19, 2017
    #6
  7. Jul 19, 2017
    montanacj

    montanacj Member

    Joined:
    Jul 11, 2012
    Messages:
    794
    It seems like you can run rotella in pretty much anything. That Valvoline racing oil isn't a bad idea either.
     
    montanacj, Jul 19, 2017
    #7
  8. Jul 19, 2017
    Glenn

    Glenn Kinda grumpy old man Staff Member

    Apopka, Fl
    Joined:
    Sep 21, 2002
    Messages:
    12,375
    Rotella diesel or Valvoline diesel for us.
     
    Glenn, Jul 19, 2017
    #8
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