There are several oil blenders out there that make oil to a customers wishes/needs.
MFGs will change blenders every so often for various reasons.
Even Honda has switched a coupla years ago for some reason(price?).
Mercury Marine just switched blenders back in June.
Switch usually calls for a new,(as in 'up dated') labeling design. Won't say who makes it, but shows/tells dealers that this is the 'new' stuff.