When pulling the PCV hoses I noticed some oil dripping out of the port leading to the passenger side PCV. Attached below is an interesting finding. The intake plenum is pretty nasty. There's fuel smelling oil dripping out of it, and some oil dripping around the gasket (soaked). Three of the runners have plenty of blowby, but the other three barely have any residue. Please note that the passenger throttle has more build up to the point some of the hoses on the same side has some build up as well. The passenger turbo is the one that has been leaking a little bit for the past couple of years on the cold side. At this point I wonder if the PCV is clogged up. I do need to get dual catch cans at some point.
The valves look pretty good. Here's an example in one of the oily runners:
Oddly enough, I don't see any oil residue in any of the pipes. However, I've not checked the pipes connecting the turbo inlet. The MAFs are super clean, too!