although for air cooled Porsche's, theres a lot of stuff that pertains to motorcycles...even mentions syn 3

http://www.lnengineering.com/oil.html#Z5

 

Very interesting reading. Thanks for posting. High detergent synthetics might not be so good. Brad Penn seems to have very good oil according to their tests.

 

When it comes to these oil topics you need to role up your pants legs.