Sunoco was not the best for quite some time. They were not top tier for years for some reason? I used it when I had my old muscle cars until the quality dropped. It dropped about the same time they dropped Ultra 94. That was the best. Something happened about two years ago and now Sunoco is top tier again? Very strange. I avoid bargain brands. They are cheaper for a reason. They use the minimum allowable additives. With past pickup trucks I used bargain brands and the injectors would get the ticky sound from getting clogged. I used good gas and it didn’t happen. Strange I think Costco is Top Tier. Not sure on Walmart? I stick with what is local for top tier. Shell, Mobil, Sunoco and now there is a nice new Irving near me which is Canadian owned. Canadian gas for a Canadian built car. I feel bad for you guys that are stuck with 91??? Anyone use Citgo? It’s owned by the commies in Venezuela. I’d walk before I gave one cent to them. I’m surprised they are top tier. They can drink it. And for the American dealers that sell it. Screw you.