Thanks for the heads up! I will check mine.
The CP design that use the C-Clip might be prone to leakage, but at least you actually SEE the mess, I have the Vishnu CP, its certainly 100% sealed but the sensor might be covered with oil... I'll have a look.
Very interested in the intake manifold pics after 50k miles, the n55 is supposed to be a bit better on that subject (supposed better crankcase ventilation system).