Under smog control most are, but with the Hemi's higher compression and the common use today of shorter piston skirts and fewer piston rings, the Hemi produces a lot of blow-by compared to your typical six-banger, or engine with a flatter combustion chamber..............
.......A final option is the oil catch can which ensures the fuel air mixture is consistent, even with lower octane fuel, by preventing combustion interfering PCV dredge from entering the combustion chamber.
I admit, if I were so inclined, I wouldn't go stop light hustling with 87, but for around town, I get plenty of zip, and you only have to smell the nasty in the catch can to know that stuff is no-bueno for combustion.
Okay, got my catcher's gear on waiting for the spitballs from the catch can haters....!