Get a selection of 5 Quart Jugs of Mobil 1 Motor Oil as low as $22.88 at Walmart.com with free in-store pickup. Plus, send off this $12 mail-in rebate to drop the price further to $10.88. This is the lowest price we could find by $12. Choose from six types of oil at this price including the pictured 10W-30 Full Synthetic Oil, which drops from $25.47 to $22.88 to $10.88 after the rebate. You have until October 31, 2017 to make your purchase and there is a limit of 2 rebates per household. Sales tax is charged in most states.