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80W90 or 85W140???

Discussion in 'Early CJ5 and CJ6 Tech' started by Southtowns27, Mar 30, 2005.

  1. Mar 30, 2005
    Southtowns27

    Southtowns27 Custom Title

    The Backhills of...
    Joined:
    Feb 4, 2003
    Messages:
    536
    I'm changing all my fluids and was wondering which gear oil I should use. I'm leaning more toward the 85W140 since it is just slightly thicker and my Jeep gets driven only during the summer and usually at highway speeds. Is there any downside to using the heavier oil?
     
    Southtowns27, Mar 30, 2005
    #1
  2. Mar 30, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    If you were in TX or somewhere hot like that I'd say the 85-140 but for where you live 80-90 should be fine IMO.
     
    sparky, Mar 30, 2005
    #2
  3. Mar 30, 2005
    Chuck

    Chuck Sponsor

    Southshore Ma
    Joined:
    Sep 19, 2004
    Messages:
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    I agree with Sparky, FT.Worth Gear & Axle recommends 85w140 in Texas and other hot climates . I would stay with the 80w90.
     
    Chuck, Mar 30, 2005
    #3
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