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As a matter of fact, you CAN also have too much zinc in the motor oil. Too much zinc increases the formation of sludge and pitting of metal surfaces.

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Not trying to start an argument here, but 2 things come to mind.
1. Why did the other bearings, rods and mains, look like new?
2. There ain't no sludge in my engine, or pitting, for that matter.

Thanks for your input though!