Advice needed - Smoking Boxster S

[KuaiThunder]

I posted a reply previously not sure why it didn't show up.

Thx for the advice. I would definitely change the AOS before I try anything else. As the car has problem on the country side I tow it to the nearest shop instead of the shop I used to. I just worry about whether this guy know how to change the AOS. I read on Youtube seems like a simple task..

[VGM911]

This link will take you to a very good explanation of the air-oil separator:

Porsche 911 Air Oil Separator Replacement - 996 (1998-2005) - 997 (2005-2012) - Pelican Parts Technical Article