2.0 front engine cover cam sensor oil leak

[Subie newbie]

I have a 2012 Impreza wagon with 2.0 automatic in it and going on 3 rd motor due to front engine cover and a cam sensor leak, response from Lou Fusz Subaru was ALL Subarus leak and you should just deal with it, my question is how to deal with it, monitor and refil oil as needed or do I add a stop leak to engine oil, motor has 126k on it and no noticeable oil on garage floor just minimal drips on cover, I use a high mileage full synthetic oil also, and ideas or feedback would be appreciated