those tests seem kind of pointless, what good is an oil that protests to a temp you never see in real life. I'm more of a try and see for myself person. I have rode once a week on average most of the day for over 20 years, also work on bikes for other people in the club so I see what other oils and maintenance does inside. ive seen the factory oils are nothing special really. we have a lot of mud and cooler weather, a lot of stop and go, I change the oil way more than whatever normal interval is supposed to be with the Valvoline atv, once in the spring and once in the fall. in the Hondas seems even more important to do frequent oil changes with the torque converter doing a lot of sheering in stop and go and work and the cleaners in the oil are very important too. ive put many thousands of miles on the engine always look good good inside, and its pretty cheap at Walmart I think it just went up to 4.50, so 20 is worth it to me. I can see if you live in southern areas might be worth the extra for the heat protection but here seems to me to be about the frequency more than anything and the Valvoline has less clutch in it on those ones and if its black means that stuff was in the oil and if you run synthetic and wait forever for the change that black crud is in there that long too
I think the noise must be something in the initial oil, a lot of people hear that and it goes away on the first change and runs smoother no matter what you change it to, ive read synthetic or Honda stuff which is nothing special.