Walmart.com has 5 Quart Mobil 1 Full Synthetic Motor Oil (Various Models & Grades) on sale from $22.88 - $12 Rebate = $10.88. Free store pickup where stock permits.

Amazon.com also offers their Prime Members select 5 Quart Mobil 1 Synthetic Motor Oils (Various Models & Grades) on sale after rebate linked below. Shipping is free w/ Prime or on orders of $49 or more. Thanks PhillyEagles [discuss]

Note, items must be marked 'Ships from and sold by Amazon.com' to qualify

• 5 Quart Mobil 1 High Mileage 5W-30 Motor Oil (120847)
  • $22.88 - $12 Rebate = $10.88
• 5 Quart Mobil 1 0W-40 Synthetic Motor Oil (120760)
  • $22.88 - $12 Rebate = $10.88
• 5 Quart Mobil 1 10W-30 Synthetic Motor Oil (120762)
  • $22.88 - $12 Rebate = $10.88
• 5 Quart Mobil 1 5W-20 Synthetic Motor Oil (120763)
  • $22.88 - $12 Rebate = $10.88
• 5 Quart Mobil 1 0W-20 Advanced Full Synthetic Motor Oil (120758)
  • $22.88 - $12 Rebate = $10.88
• 5 Quart Mobil 1 Extended Performance 5W-30 Motor Oil (120846)
  • $25.47 - $12 Rebate = $13.47
• 5 Quart Mobil 1 Extended Performance 5W-20 Motor Oil (120765)
  • $25.47 - $12 Rebate = $13.47

Note, Amazon.com rebate submissions must include the following info:

Web
http://www.amazon.com
Address
410 Terry Ave. North
Seattle, WA
98109-5210