hey guys, gettin ready to take my 05 SS/SC in for an oil change n tire rotation. I've been noticin that the dealership charges like 8 bucks a quart for the mobil one, so i was thinkin bout goin to walmart and jus buyin my own oil and lettin em use it since they said they would do that. What im askin is, what exactly type of oil do i need to get. I know its Mobil 1 5W30, but isnt there different types of 5w30, like clean 5000 or whatev. And how many quarts do i need to get of the right stuff, and how much do ya think i could pick it up for at walmart? Surely at least like 20 bucks cheaper than the dealer right?