If you don't mind using Pennzoil. They are running a promotion. Buy 5 quarts (synthetic) at participating retailers, upload your receipt and get. $22 shell gas card. This oil can often be had at 17-25 bucks at Walmart
https://promotions.pennzoil.com/diy/O1910_1/index.cfm
https://promotions.pennzoil.com/diy/O1910_1/index.cfm