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I misspoke earlier and I do agree that Porsche engineers are qualified. However, I do find it interesting that everyone is eager to state that the oil change interval is inordinately long but we should accept their break-in advice. Now some of you have pointed to studies that support your claim that oil is shot by 10k or so and with that, I would then agree with you. As a doctor, I am going to have to put this into medical terms: the big push today is what is called "evidence-based medicine" where your practices are in line with PROVEN practices supported by medical literature. You would be surprised how many physicians out there have certain ways of treating conditions that are not in line with the literature, but are based on 1 or 2 cases that went bad (or very good) for them in the past and they changed their practice patterns based on this. What I want to see is evidence that hard break-ins are detrimental to the engine and how they came up with the 4200rpm limit (ie. whether that be from VarioCam kick-in). I do not accept "because they say so" as these recommendations may be holdovers from years past. They have lowered the break-in period from 2k to 1k and that just may be a push towards breaking those old ideas but they cant seem to really "pull the trigger" all at once.
Just my $0.02
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