Valvoline has been playing the same kind of game. I've used 5W-30 conventional in wifey's 2012 Subaru since we bought it new. Two oil changes ago all NAPA had was a synthetic 5W-30 "blend". Said I wanted straight conventional and gave them the Valvoline number from a quart that I still had. Same number on the "blend". NAPA contacted Valvoline and they claimed that the 5W-30 had always been a blend to get the viscosity range. OK, I buy a case of oil and change oil. This last week it was time to change oil again, go to NAPA, the old 5W-30 (not the "blend") is back on the shelf, same part number.

Bought a case of that and left shaking my head.