Let me give you a lil insider info, You dont always get the good stuff even tho you pay the price. When a "gas station" orders 91 octane"premium" from a supplier, and the supplier is out of it, they'll "the supplier" let you fill your 91 octane tanks with 87 octane fuel. "only if they cant fill the original order", which they still sell it to you at 91 octane prices.
I paid $3.23 at Shell, in other parts of town it is $3.35 for the same fuel at another Shell station and I live in a smallish town... pop 85,000