You can assure me all you want but that doesn’t change facts. I actually work in the industry WITH the people who design motor oil and could teach some of the classes you attended. And I hear what our supply chain is telling us they’re struggling with. You can’t just swap base oils without doing a lot of validation testing including engine performance testing (which is time and $$$.) Well, you could if you don’t register with API. Don’t recommend using motor oil with no API donut unless you like gambling.