I have a 2012 Subaru XV which I have just been told today has this exact engine leak. I took it for its 3 year service today, 4 days before the warranty runs out and as told this.
It's going to take 3 days and the engine has to come out, but Subaru will be paying the bill. Lucky for me that the dealership at Glen Waverley detected the problem before my warranty was up. I didn't smell any oil burning either.