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Zinc in Mobil Oil

Discussion in 'Intermediate CJ-5/6/7/8' started by nwedgar, Mar 30, 2012.

  1. Sep 2, 2016
    nickmil

    nickmil In mothballs.

    Happy Valley, OR
    Joined:
    Sep 23, 2002
    Messages:
    12,529
    There have been many warnings from engine builders and remanufacturing companies about zinc and flat tappet engines since the oil companies started reducing the zinc content in their oils. Most reputable ones now supply either the break in oil with the zinc or a zinc additive to put in the engine on start up. Not hard to figure out why they do this or why not following their procedures by using their additive/oil would negate the warranty.
     
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