Long time ago, I was hyped like everyone else about the IMS. But my PZ (Porsche Zentrum) always calmed me...drive the car regularly or you will find oil spots on your garage floor, which is known and normal, NOTHING to worry about. They checked it every other year...always good, no need to change or replace it.
And my car leaked since day 1, when it sat in the garage too long.
SO...I threw my worries over board ever since...YEAR 21 and still running. Lucky me?