Costco Gas is pretty much a rotation in my regular fuel fill up now. More often than not, they are the cheapest for the East side/Henderson part of town. On top of being the cheapest, it has that stuff in it that makes it better. I don't know what is called but yeah, you know what I am talking about.
You already know you have to be a Costco Member to have privelages to buy gas. You already know that the line can be long but that they do move fast.