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The other old-school technique is to run one quart of ATF in your oil for a few minutes of running time, then drain all the oil out and replace with normal oil. Have done this personally and fixed tapping top ends on several 944 cars over the years. Various products out today as mentioned above may work better, I don't know.
YMMV, do at your own risk etc, as I know there will be naysayers...
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2018 911 Carrera coupe
1972 911T targa
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