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CP piston moly coating coming off maybe

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I have installed a couple piston with a moly coated skirt (see pic), I have dropped the oil to check it after .5hr run time and noticed some black specs in there. I am assuming this is some of the moly coating of the skirt, it’s not a lot and I’m not too concerned. Just thought I would check and see if anyone has some experience with these pistons, and is this normal?

 

Thanks

 

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The black specs were mainly on the long screen, with some in the drained oil.

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