After visiting my local O'Reilly auto parts, they have a rebate going on where if you buy up to six quarts of Quaker State Synthetic (Valvoline sythetic also has the same rebate going on), you basically get them free after mail in rebate. I know rebate checks take a long time to receive, buy you can't complain about free sythetic oil. Check out the link below and scroll to the bottom for details. http://www.oreillyauto.com/EW3/TopRebates.do
