After seeing voa's showing ps4 in the 20w50 range I'm actually considering the mobil 15w50 as it doesn't get very cold in southern nc. Also ps4 extreme is 10w50 so this probably is an excellent choice.
_________________________
2007 Chevy Silverado, Valvoline Synpower 5w30
2010 Chevy Equinox, Valvoline Synpower 5w30
2012 Polaris Sportsman 500, Polaris PS4 5w50