Oil with ZDDP ?

RAT ROD AL said

I believe STP oil treatment is loaded up with zink. Last time I checked.

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yes, I have a couple cars I just add STP to conventional oil. Blue bottle that says "zinc" on it. Something like 2.49 at Walmart. Rislone as well. I also have used MaxxZDDP additive bought online. Never an issue with any of it.