Guys...discount fuel and “top tier” fuels are the same shit lol. Just marketing gimmicks. They all must have the same detergents in them legally mandated by the government. 93 Octane is of importance with regards to our trucks however. Even if you guys DID want to argue that shell or mobil has extra detergents in their fuel, it doesn’t matter one bit with our direct injection engines. Detergents in gasoline only help port injected engines. So fill up with whatever is around, but go for the 93 octane. Y’all are seriously overthinking gasoline nowadays.