How often to change oil?

[schnellman]

Originally Posted by san rensho

Since this post has predictably turned into a discussion of which oil is best, I'll put in my 2 cents worth.

http://www.planet-9.com/cayman-boxster-tech/60791-calling-all-engineers-motor-heads.html

Thank you for providing a link to this most excellent (and very long) article. Everyone here should read the entire article before drawing conclusions regarding their choice of oil and/or change intervals. I've always been happy with Mobil1 0-40 every 5000 miles or spring and fall. Having read this article, I think I'll stick to my plan. Flame on, boys!