Same here. I had my stock blower off twice (once to put on the Kenne Bell snout and a 2nd time to put on my Whipple). Each time I remove a blower (does not matter which one), I find lots of oil inside it. The harder you drive your car the more oil you will find inside there. This is normal, even on NA engines, but FI engines can be even worse. The worst part is this oil migrates forward through the SC, down through the vanes on the intercooler, coating EVERYTHING in the intake tract. At least our intake design has a bit of an internal separator such that intake air after going down through the intercooler, has to go back up the outside of the intercooler to get to the head. The oil stays down in the bottom of a "chamber" that the intercooler resides in. There is an elbow at the lower-most point, and a rubber hose that goes up, and BACK INTO the side of the SC (an endless loop of oil flow). It is important to note that the oil enters this "loop" via the PCV valve.
I have been researching CATCH CANS for some time now, and there are many on the market - some are better than others. I have not happened to check out the Mann 200 yet, but will. I WILL put a catch can on my car - immediately. The heat/oil combo on the fins of the intercooler eventually make a sludgy build up, reducing the efficiency of the intercooler. This is a KNOWN phenomenon, and is common to most if not all modern autos that vent the PCV to the intake. It just is worse if you happen to have an intercooler residing in your intake tract...