Here is a screen shot from api.org. It describes the benefits of the new API GF-6A motor oils and declares API GF 5 as obsolete.
Edit: The fine print says Obsolete as of May 1, 2021.
![crazy2.gif](https://bobistheoilguy.com/forums/graemlins/crazy2.gif)
Edit: The fine print says Obsolete as of May 1, 2021.
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