dnewton3
Staff member
Reality of UOA's
"Because we’re an independent laboratory, we don’t recommend any specific oil brands. We always recommend using an oil grade recommended for your engine by the manufacturer and a brand that fits your budget. But beyond that, we find that brand makes very little difference. If there were an oil that consistently out-performed the rest of them, we’d have no reason to keep that information secret, but we just haven’t found that oil yet."
https://www.blackstone-labs.com/which-oil-is-best/
Blackstone's statement is one of general application, not specific attribution.
In short to moderate OCIs, brand often makes no difference whatsoever. In extended OCIs, brand can most certainly make a difference. Oils which are specifically formulated for extended drain intervals will excel past "normal" oils in this regard.