When you buy 3 or more with Shoprunner and use coupon code AZMAIL0809 the price comes out to $18.69 +tax. Less than 3 comes to $21.99.
Wow... even if you don't have ShopRunner, you can still get 4x 5 quarts of 10w30 High Mileage synthetic Mobil 1 oil for $78.17 shipped (+ tax).
At $19.54/ea, I'm really thinking about clicking that "buy" button.
If you have BOA card, don't forget to activate the cash back deal in your bank account online. You get 5% cash back from Autozone.
When it asks for a zip code, use 90210 to get price to appear.
ALL credit given to Flyingmau5, dude123, and bakerzdosen @ slickdeals.net