that is a great deal, i just bought some 2 weeks ago...valvoline denied me a 5$ rebate on their engine guarantee rebate cuz i only bought one jug, not multiple, but all form said was to change oil and send foil from container(s)...pennzoil sent me the 15 check on pp no problem...to me valv and castrol are overpriced and not as good as sopus or exxon-mobil...going by oil shelves QS conv seems to far outsell castrol and valv at china mart...why buy valv at 15$ when you can get QS synthetic for 18.50 or reg QS at 10.50$?