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, dropping the price to $10.88. This beats our mention from last year by $1 and is a current price low by $12. Choose from 11 varieties at this price, including the pictured 10W-30 Full Synthetic Oil. You have until May 31, 2016 to make your purchase and there is a limit of two rebates per household. Sales tax is charged in most states.