High crankcase pressure is an indication for “breather hose” – pressure regulating valve (working as a pcv valve) plugged.
(Make sure you get the “cold climate” application).
Turbo intake hoses have always oil in (at least many mechanics state it). The amount of oil is of importance here.
I’m not sure if oil could enter the intake from other direction but turbos.
If your car mileage is 60k km and more you are most certainly due to oil leaks fixing.
German cars have very often leaks….
Audi manufactured 2.8 and 2.7 engines for 15 years and never fixed the leaky seals and gaskets.
As we speak my car (03 A6 2.7T) is in for leaks fix (cam adjusters and breather hose) (in Calgary).
You might have more than one problem. Monitor the car after the cold is over.
Hope no more -37C this winter…
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