If it was me damnnissions I would take that car back demand it be fixed. I have not had a new car ever use oil. If they want fix issue I would trade in for different subaru. My car has same build date as yours, if it develops this type of problem it's gone.
As a matter of fact If I would have known people had this issue last year before I bought this car I would not own a subaru now.
I think you need to reconnect Soa and voice your concern.