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4.0 Oil

Discussion in 'General Jeep Discussion' started by SmittyJeeper, Jan 9, 2020.

  1. Jan 9, 2020 at 5:16 PM

    SmittyJeeper [OP] Well-Known Member

    Jun 24, 2017
    06 wrangler 4.0 6speed
    5" lift, 4.11 gears, tru-trac limited-slips, winch, bumbers... you know the rest.
    So what’s everyone using for engine oil in there Jeep 4.0? 10w30? 5w30? 10w40?? Brand? I would like to know what you guys use and why? I know this is A highly opinionated subject. Some guys say whatever Jeep says to use and others like to run high ZDDP oil for the flat tappet which is found in diesel oils and specific types of oils as well. Go ahead and send it.
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