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Originally Posted by Brucelee
Oil threads usually never reach agreement.
I would say that I have never seen a used oil analysis that would support an interval near 20K on any Porsche.
Just my experience and who would want to risk this on a car that you are going to keep?
These engines are expensive.
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I just find the possibility that Porsche would recommend an interval which results in the engine running on trashed oil fascinating. If the 20k oil is inadequate, by virtue of failing objective, widely accepted test levels, it blows my mind that the factory would recommend it. Awaiting a 20k test eagerly. There's bound to be many here following the factory recs, or?