Isn't SOPUS conventional (QSGB and PYB) way, WAY superior to anything out there now? They are actually majority Synthetic GTL based (?!) Don't sacrifice a GREAT oil choice in a Jug over the price of one measley gallon of gas for your "cheap insurance" oil change.
Back to warren (there are too many warrens within warrens in the oil business!)
I've used Supertech what seems like a long time ago and it was a really great oil, no kiddin. Don't know what it is mde of now, surely be location specific.
Up here ST "dino" use to be Exxon Superflo in disguise - which was my dino of choice a while back - and up here, it was within pennies of MC5K so I took the 5k which - had the best basestock at the time.
My cars spec Synthetic so I am off the "dino" merry-go-round, except for my snowthrower and genset.
Valvoline Racing VR1 10w30 synthetic would be my Texas goto oil.