SD Motor oils were spec'd for cars 1971 and older
SF Motor oils were spec'd for cars 1988 and older.
@Captain Kirk; Why are you digging this ancient data up, and quoting it like it is current?
This data has no bearing at all on the latest dino oils on the market....You Failed Again.
No new car much less a new Cadillac is using SD/SE/SF motor oils. Get your 'FACTS' up to date.