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Pre-run my a$$! Who in the world is going to run an uninstalled engine, at varying speeds, for approximately 25 - 25 hours to get the 1500 miles? It wouldn't be under load and it wouldn't have any cool down. Sure it's been pre-run to the point that they made sure it actually works - but pre-run to the point that everything is seated properly and ready for all out revs? I don't think so.
I have this picture in my head of all these engines in a warehouse being pre-run with guys in white labcoats and clipboards walking around taking measurements.
Skipping the whole "how to break in an engine" thread (which I also could do without) - I agree with Jim and BruceLee to treat any new engine as a new engine. It can't hurt while running it "like you stole it" definately could.
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'06 Cayenne Turbo S, Beige Metallic/Tan
Ex - '99 Arctic Silver, Red Interior, Silver Top
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