Just carrying out abit of a big service on my G60 cleaned air pipes out from supercharger to intake manifold, including intercooler, what a mess everything was covered in thick sticky black oil, is my supercharger leaking oil, or maybe it is all from the breather pipe on rocker cover that connects to the 2nd inlet overflow air return to supercharger from intake manifold? any ideas or have i confused you all with my arse discription.