This link is still up for maintenance intervals on
Porsche.com, it was last updated in 2010.
For m96 engines they recommend 2001-2004 Boxsters (assume its intent is to address single row IMS?) oil to be changed every
12,000 miles or every 2 years.
For m97 engines they recommend these 2005-2007 engines have their oil changed every
20,000 miles or every 2 years (???)
For 2008 engines (last year of m97) they bring it back down to
12,000 miles BUT they want the oil changed at least
annually for the first time.
For 2009 engines (no IMS), they cut the oil change to
10,000 miles but want it changed every year.
Huh???
You would think Porsche would be doing its buddies at Mobil 1 a solid (= $$$$) by halving these interval recommendations. But no....
How can the factory and just about every expert and enthusiast community be at such opposite ends?
p.s.
This is not a discussion of your favorite oil, your favorite filter, why the other guy's oil sucks, etc. Simply trying to understand Porsche's position here.