Originally Posted By: doublebase
I always was under the impression that moly and boron were/are, superior additives for engine protection. So every time I see Napa/valvoline I think of an oil that is slightly below the leading brands (Mobil, Penzoil, etc). I have used NAPA synthetic many times before - because it was on sale - and I find that I tend to use a little more oil compared to Mobil 1 in my car. I really don't know know if it's any worse than the other brands...maybe, maybe not. I'd use it again, but I'd keep the intervals around 5,000 miles, that seems to be the sweet spot for oil usage in my car using NAPA synthetic.
I hear you about the moly and boron. But look at Mobil Super 5000. The add pack we can see on paper, minus the titanium, looks similar to NAPA/Valvoline, and it does not have boron or moly. There are some very nice UOA's on Mobil Super 5000 here on these forums. I think Lubrizol has a hand in the NAPA/Valvoline add pack, but I don't know about the Mobil Super 5000.