Oct 10 1989 Mobil 1 Full Synthetic Motor Oil $21.99 +tax from Costco.com free shipping Posted on October 10, 1989 by DealFinder Rating: 0 Posted By: homersaysdoh Views: 22 Replies: 0 Mobil 1 Full Synthetic Motor Oil $ 21.99+tax from Costco.comVarious grades available, some are selling out. Might be same price at B&Mhttp://www.costco.com/motor-oil.html Fatwallet.com Hot Deals