Amazon takes an extra 5% off a selection of Pennzoil Motor Oil 5-quart jugs, as listed below, when you checkout via Subscribe & Save. (Certain items require a Prime membership.) Plus, this mail-in rebate cuts an extra $2 off each item. Better yet, all orders bag free shipping. The deals, with prices after all discounts, and with Prime unless noted:

• Pennzoil Platinum SAE 10W-30 Full Synthetic Motor Oil 5-Quart Jug for $19.22 (low by $6)
• Pennzoil Platinum 5W-30 Full Synthetic Motor Oil 5-Quart Jug for $19.22 (low by $6)
• Pennzoil Ultra Platinum 5W-20 Full Synthetic Motor Oil 5-Quart Jug for $21.77 (low by $6; no Prime)