Except for a few HDEOs and 4 stroke oils. Inversely, why 15W40 never existed as a PCMO in North America? It has been one of the most popular grade here and still is to some extent. This is a mystery because 10W30 would have been perfect for our mild climate but over the decades the popular viscosities were 20W50, 15W40, 10W40, 5W40 and then 5W30.