I have this too. When I had the undertray off the other week to do the turbo vacuum lines, I noticed there was a fair bit of oil collected there.
I looked around online a little and I got the impression that oil does collect here as it's one of the lowest points of the engine, but I'm only going by what other people said.
Sent from my iPhone using Tapatalk
yeah I got that impression too, I’ve cleaned it up with a rag and I’ll check up on it later.