My local Wal-Mart always has Quaker State for either $10 or $10.50 for a 5qt jug. I a bought a couple jugs a year ago. And used them, then I got a couple jugs of GTX and Penz YB for that price now that they are gone Im thinking about going back to Quaker State. Granted Penz YB is only $2.50 - $3 more for a 5qt jug but I dont really know if it is worth the price. There is not a huge following of QS here on BITOG. I think it is a decent oil at a great price. I like to keep 3x oil changes for both my car and my wifes on hand (5w20 and 5w30). So I am thinking about grabbing 6x of them tomorrow, heck thats 30qts for only $60. I'd like to see more or the Quaker State users chime in. For the price im amazed there arent a billion users of QS on here. From what I gather it is just like Penzoil YB with slight less add pack.