I'm generally avoiding Mobil I due to their horrible performance in my Subaru, which was my first turbo car. Constant oil consumption, even when new. Switched to Pennzoil Platinum, and MUCH better.
I got 2 of the 5 quart jugs of Castrol Magnetec that was on sale during Prime Day. $13.60/jug. Can't beat that price. I only have 1500 miles on my Stinger so will be awhile before I have to change the oil
Royal Purple guy, here. Been using it for over a decade, and it's always resulted in the "quiestest" engine for me. I tested against Mobil 1 and Pennzoil at the time, and Royal Purple also seemed to last a little longer before it was as "dirty" as the other oils... Though, without sending the oil out for testing, that really doesn't mean a whole lot visually, lol