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wow 300v is very low zinc........much lower than I prefer....BUT for a modern engine, that should be fine.....on older engines (like my 928) were designed around much higher-zinc phosphorus levels...and will eat themselves VERY quickly without the lubricating properties of zinc (zddp)
The reason the modern oils are so low is SMOG......since the zinc in theory an cause accelerated wear in the catalytic converters.....
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