Was inspecting the turbo inlet hose between the air filter and the turbo the other day (to look at the crankcase vent hose to see if it needs revised) and found that the oil soaked turbo inlet hose had softened to the point that it had disintigrated under the worm clamp holding it onto the turbo flange

There were several holes and cracks on the
underside that were letting in dirty air. Wow... I wonder how long that was "sucking"
Got a few miles left on the warranty so they're replacing it
and the other oil-softened CAC (intercooler) outlet hose under warranty. The CAC inlet hose was recently replaced. Asked them to clean out the intercooler, but doubt that will happen. That crankcase oil injecting vent hose will need to be revised asap. Could the oil your seeing be leaking from under there?