Amazon recently showed the Pennzoil Ultra Platinum 5W30 with the new ILSAC GF-6A and API SP rating on their website. I bought a 5-qt jug and the oil I received had the old SN+ rating with a manufacturing date code of Jan. 2020. Not totally unexpected since the new specs didn't become official until May 1, 2020.
Has anyone been able to buy oil with the new ratings?
You can return it.
Online buyers are going to be involved in hit & miss opportunities, when SP is shown online and one receives SN Plus, for quite a while yet. Webpage updates don't always reflect or mirror current inventory.
If you must have SP / GF6 right away, then go to a brick & mortar store to find it.