Haha, ok the great oil debate will end here with this reply, I ended up getting 5w40 turbo diesel oil MB1.

Started most of the prep last night draining fluids taking apart the plumbing to the turbo, and man, the pipe to the blowoff/waste gate was completely blocked off with oil and grime, wonder how it even functioned??? It still holds a vaccuum so I at least have that going for me.

I figured out what all that crappy wire tapping into the fuse box was, some wonderful 90's style phone speaker and microphone set up....now trashed.