I just came back from my local AutoZone. The 0w-30 shelf has been restocked with M01338. It had nothing but M05288 (including in the backroom) as recently as a month ago. Where is it coming from? The bottles look completely clean, not a hint of dust. Looks like they're trying to get rid of the old stock. It's kinda sneaky the way they do that - moving the 4 year old oil to a busy store and then selling it at the regular prices!!!