Sorry, about not recalling all the facts, but the buildup I was referring to was a carbon buildup in the engine, that higher RPM's get rid of.
Here's the thread, and the long debate that goes with it: 
Keep her above 4000rpm and she'll thank you for it every day.
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1999 Ocean Blue Metallic Boxster - blueboxster.com
Last edited by rick3000; 06-02-2008 at 10:12 PM.
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