I wish we had more data about private brands. Never found a web site that had that information in a single place. Sears Spectrum (Warren Performance) is the only private brand oil whose manufacturer is on the bottle (at least that I've seen). My suspicion is that Valvoline has a big private label business.
Is this Havoline Chevron, or old bottles from the Shell partnership? If the former, it's probably better than if it's the latter.