I pulled the TMAP sensor on my '05 MCS on Saturday to try to cure a longtime problem, when I did, the TMAP sensor was dripping with an oily substance, it makes me think that my SC seals are shot and its pulling SC oil into the intake. No oil loss from the engine sump, so its not coming from there, unless its from the EGR. BTW, I've got 163k on it, oil changes every 5k miles, had the SC serviced just 23k ago. Just thinking, has anyone else seen this on their MKI MCS?

 

That's not unusual. You have a direct line from the EGR (valve cover) to your intake tube. You'll find the same oily discharge inside the supercharger air duct on the other side of the throttle body.