Right now you can get a $6 Olivari Olive Oil Coupon on AllYou.com. I checked the price at Walmart and it looks like this is priced at $12.48-$12.98 which means that you are paying around half price with this coupon!
Olivari Olive Oil (51 oz.), $12.48-$12.98
$6/1 Olivari Olive Oil Coupon
$6.48 after Coupon!
That works out to about $0.12 per oz.
You can get 2 of the Carapelli Extra Virgin Olive Oil 44 oz. Bottles for $19.01 with Subscribe and Save. That works out to just $0.22 per ounce.