I'm not sure, as I don't buy AC Delco brand fluids. The price per individual qt looks pretty good (the full syn on sale for 5.37/qt), but when I added 12 qts to the cart and did a shipping estimate to my zip, it said 25.47 for shipping. That seems pretty high. (I can usually get a case of 12 qts oil shipped for roughly half of that.) That adds roughly $2/qt...you might check your local options and compare.
Are you set on AC Delco, or would another brand be acceptable? For instance, this is a case of 12 for $55 with free shipping: https://www.amazon.com/Amalie-160-72876-...words=dexron+vi