I am considering using one of them, but is concerned over their ACEA ratings. PP 5w30 is A5/B5-04, M1 0w30 is only A1/B1 rated.
Real question is do the ratings mean anything?
M1 5w30 has many ratings, GM 4718, Accra HTO, Ford, etc, but still got bashed/beaten in wear protection. Valvoline Synpower 5w30 "claims" to be meeting GM4718, but is NOT on GM's approval list.