Zinc Rich Oil for Flat Tappet Cams

Garrett Ellison said
Even though at the present, I am getting by fine with rotella SAE 30 diesel tractor oil with a bottle of Rislone and a bottle of blue STP... I am not really testing the limits of hydraulic cam valve spring pressure either though. Other than 10:1 static compression and headers, I am a whole lot closer to stock than to “race”...
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And I am GLAD you brought up the STP. Here's another big tip. DO NOT buy the store brand STP. It comes in the same blue bottle. Same shape. Same size. It HAS ZERO ZDDP additive in it. Only the Name brand STP does......and always has. It's good stuff.