I had the trap oxidizer off to make a substitution pipe for my 300. I did not see any evidence of the oil film at that time. Mbenz put on one of their replacement pipes around 90 or 91 and there was no evidence of the film at that time. As it has been some time, I think I will look and see. The PVC valve has to give up some oil for sure. I will make a pic and upload it when my wife gets back from shopping.
I spoke with Ronnie Childress yesterday, who is the local Mbenz shop manager about this idea.
He gave me some pointers on the ALDA and the turbo. Things to look for. One thing he pointed out was a small filter inline with the vaccumn to the ALDA the he said gets stopped up and will cause all kinds of problems. It is hidden behind a hose on the water pump, in front of the head to the right. I'm going to block the Vac. line to the EGR valve and see if the performance increases.

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