Thread: What oils are you flat tappet guys running?
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Old 01-01-2020, 09:44 PM
JimFB400HO JimFB400HO is offline
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Join Date: Oct 2002
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Conventional Pennzoil (30W, as recommended) is all it has seen for decades. Since the zinc and phosphorus was reduced in oil, I add ZDDP-Plus every oil change.

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