Sounds to me like your
Sounds to me like your vehicles would qualify for lemon law if this issues are legit, ive never seen one car have anywhere near this kind of trouble, let alone 2, I am aware of the oil consumption on some of the early FA/FB motors when they moved to 0w20 oil, given the current market you could get some good money for your 2015 Forester with only 63k miles, so with your luck, I’d move on and try to have better luck with another brand, and see if that fixes your issues