Any Mobil 1 oil that has actual Porsche A40 approval isn't going to be "not so great from a performance standpoint", nor will any other brand with that approval. Just make sure it isn't "approved" as you use in your post. Easy to check against a Porsche approved oil list.
This thread reminds me of The Shed at Dulwich. Lots of commentary on that and more than one documentary, but here is one article:
https://www.vice.com/en/article/i-made-my-shed-the-top-rated-restaurant-on-tripadvisor/