Is this oil residue anything to worry about?

[Hammerhead]

(10-13-2016 )ClarkWGriswold Wrote:  Thanks for the detailed answer! The truck has 764076 miles. I do a fair amount of idling hauling corn. Not sure on the age of the turbo but I'm certain it's not original. The crank case filter is drilled out and has been for at least 30k miles when I first bought the truck. Running the m'm^2 tune but haven't had it fine tuned by anyone. My pyro is setup on the outside of the exhaust manifold and gets into the 500 to 550 range on 90° summer days. I'll take the pipe off and see what the inside looks like when I get home tonight.

When you say "Running the m'm^2 tune but haven't had it fine tuned by anyone", you do know that @m*m^2 is NOT a set it and forget it tune right?
If nobody has "tuned" it for you, have you fine tuned the turbo tables? If you haven't, it's very possible that the closing rate is too low at idle, creating a vacuum on the charge side of the turbo instead of slight pressure. This vacuum can cause the turbo face seal to allow oil to be pulled from the crankcase into the intake system...it is designed to have pressure on it, not vacuum.
At the very least, this needs to be set properly to avoid messy turbo slobber, and potentially much bigger issues. Sensor malfunctions, turbo failure, or worse yet an engine run away.