Growing up whatever Dad bought on sale; he'd take me with him whenever there was a per person limit. Quite a bit of Pennzoil, QS, and Sinclair in cardboard cans.
Later I ran lots of Havoline with the rebate specials Western Auto had.
With the demise of Western Auto, ran some Shell Fire & Ice, Phillips 66 Trop Artic, etc. whatever was on sale.
Then lots of low priced Exxon Superflow from Autozone.
Still running what's on sale / rebate but now it's PPPP, QSUD, Havoline Pro DS full syn as I can get these syn oils at lower cost than conventional.