I have used Napa 0w20 for about 5 oil changes on a 2006 Honda Odyssey EX-L.
I have never done a UOA but fwiw I have not observed any easily noticeable issues. No burning of oil. engine feels smooth, no cold engine chatter. The van has 110K miles on the odo with at least 30K of those on the Napa 0w20, another 25K on Synpower 0/5w-20, couple of the first few OCs on Honda dealership oil, and the rest on PUP 5w-20/30. Oil changed per maintenance minder with mostly city start stop driving.
I don't have scientific conclusive evidence, but will speculate that the Napa oil is probably a slightly cheaper add pack and base oil ratios for it to make fiscal sense.