If you're driving a D.I. engine, be aware that the wording by Valvoline states SN with SN Plus. That means that whatever percentage of that oil has synthetic in that blend, that's the same percentage it has SN Plus.
Not sure about today, but the old-school thought I read in some publication a year ago, was that if the '''front''' of the jug did not say synthetic blend, it had less than 15% synthetic in that conventional jug.
BTW... there's a recent VOA and UOA of Valvoline Advanced Synthetic 5w30 here at BITOG. Add-pack looks pretty robust/stout now, considering it's SN Plus.