1. AutoZone
2. Lilburn, GA
3. 5 quarts but they had more available
4. I assume they still have it in stock
I'm sure Castrol is in control of their distribution. Its AutoZone's decision to put the product on the shelves. I'm sure if A.Z. has old SJ 0W-30, they want to sell thru it ASAP. For all we know, Castrol cut A.Z. a sweet deal to buy the old SJ formulation which is why we see so much of it on store shelves. But who knows.
Let's not ***** about things we don't understand. If you want to know what's going on with German Syntec at A.Z., start at the store manager level and work your way up. Develop a contact within A.Z.'s Regional Distribution Center as they can easily check their current inventory, incoming product, and product availability in their stores. You should also find out who the district or regional rep is for Castrol, the person who is responsible for servicing local A.Z. stores and the distribution center. They will also know the status of product availability.