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Old 07-07-2017, 11:37 AM
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John John is offline
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Join Date: Jul 2012
Location: Maryland
Posts: 172
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I've had no issue's with Brad Penn 15-40 and been using it for years. Brad Penn has some of the highest levels of zinc around. I do not think Mobil 1 has the level of protection you need for a flat tappet
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