I would say it is a product problem. Too many people with issues. I have replaced my drain plug with a new Porsche plug. My original one was stripped, it did not leak and my new one does not leak. I have many vehicles that I change oil on with no leaks at the plug. I do use new crush rings sometimes, but not always.
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2002 Boxster S Polar Silver Metallic, Hard Top
2016 4Runner TEP
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