Hey guys, i dont post alot of topics up on this side, just serch to find help, but i couldn't help myselft when i ran into this. the whole thing with the oil pan being vented, deff. not a good idea. i blew out my rear main seal because of possitive pressure in the crank. basically when you boost, the possitive pressure (psi) in the intake manifold overcomes the stock 420a pcv valves, and starts dumping boost into your crank case. it is a good idea to run both ports on your VC to a catch can and just block off the port on the intake mani. where the pcv would usually go, but what makes this even better is running a line from where you would normaly vent your catch can to the inlet of your turbo(not the compressor, but where the intake filter sits.) weld a nipple on that pipe ( if you are using a pipe for your air filter.) there is constant vacuum there, so it will pull the fumes from the catch can and run them back into the motor so they can be burned. oil is trapped in the can, if you have a descent catch can. that should solve your problem. or just use a eagle talon tsi PCV valve and use it instead of the stock 420a valve. it will act as a check valve and under boost it will block of the crank case, not allowing boost to enter it. i hope i didnt confuse anybody with this post.
good luck