Hi Monica-
Hi Monica-
It is NOT a sensor and that's a lie that they never heard of this problem. There are open law suits on these issues for those years. Google it. Notify Lemon Law for you state as well so they can help you document everything. Check your oil after they change it. Tell them you want them to perform an oil consumption check and this is at their cost. Check the oil level with them when you pick it up to ensure they did NOT over fill it. You need a new short block engine. Work with the actual Subaru of America first andyhey should be able to help you. Don't mention Lemon law to subaru but contact Lemon law yourself. When they put the new short block in ensure that they change the pcv valve too.
Let me know if I can help.