As someone who has little knowledge (or interest 🙂) in 'new-fangled' engines ... is the problem 'direct-injection' or 'dumping crap out of the crankcase down the inlet'?? .... would venting the motor to a catch-can in the first place, leaving the inlet to breathe fresh filtered air, have avoided the issue from scratch!
K
If you read the Delphi article referred to above, it suggests that crankcase fume injection is not the only long term issue.
