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Old 04-10-2012, 12:11 PM
Axis_of_Evil's Avatar
Axis_of_Evil Axis_of_Evil is offline
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I use non-synthetic Valvoline VR1. It has 1400 ppm zinc and 1300 ppm phosphorus specifically for flat tappet engines. VR1 comes in several weights and in either synthetic or non-synthetic.

I believe 1200 ppm is generally considered minimum ppm zinc for flat tappet engines.
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Last edited by Axis_of_Evil; 04-10-2012 at 12:26 PM.
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