Lets try this.
Does racing a car lengthen or shorten its useful life?
Do you want to buy a car that has been raced?
Does racing involve high revs and tremendous internal stresses?
Does daily trips to the redline lengthen or shorten an engines useful life?
Do manufacturer's in general have a qarranty disclaimer for racing or other forms of abuse?
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Originally Posted by eslai
Correlation versus causation, the usual logical fallacy! High engine revs can't be shown to *cause* premature engine failure, but there are other htings to take into account. If you're the type of driver that likes to drive the car hard, there's a lot of other stress factors involved than just how many times you revved the engine.
But even if there is a correlation, that doesn't make me comfortable with Porsche using computer data that states how many times you've hit [whatever] RPM as a tool for denying warranty claims. It is not proof of any sort that you've mistreated the car... well, except for really obvious over-revving of course...
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