Usually Advance, but Autozone has them too, just keep an eye out and you'll find it. Advance also has a deal right now on Castrol Edge.

Autozone usually always has a 5 quarts and some sort of oil filter deal. I usually get the German Castrol and a filter for some other car. Usually it's some real basic oil filter. I pick up a bunch of Napa Gold filters for my Camaro separately

I run 5w40 Castrol Syntec with a k&n filter