Warren Distributing/Warren Performance Products reputation? What reputation? None of the unwashed masses knows their name. They will mix up oil exactly as cheaply as Walmart wants.
Anyway, why bother with SuperTech so-called synthetic oil? What do you hope to achieve with it? Less engine wear than a top brand name oil? I doubt it. Longer oil life? Show me the data. If I have a need for syn oil (better protection at temperature extremes, longer oil life) I'll buy an excellent syn. Otherwise, I'll buy an excellent conventional oil. "Synthetic" is a marketing term, not a technical term. Buy oil with the performance you need to get the engine protection you need.