I am puzzled by your comment above. You own a Honda...but you don't trust Honda engineers. But...you'll trust someone who posts something on the Internet that you've never met. Why did you buy a Honda then?
I owned a Burgman scooter at one time. Almost all of those who seemed to be knowledgeable said they used Shell Rotella oil. T6, I believe. That was my first exposure to it. I later bought a Honda NT700V and now I had a bike with an engine that shared the oil with the clutch. I didn't want to screw it up, but I did want to use the best. And what I was using before, was Energy Conserving and therefore could screw up the clutch.
So I spent an afternoon reading through threads at "Bob is the Oil Guy". Some guys sounded like they knew what they were talking about. But in the end, they were probably no different than any of us. They just knew how to sound knowledgeable about oil. But they did say some things that made sense to me.
Shell Rotella is one of a couple diesel oil products. Diesel owners (not your pickup diesel owners, but the guys who's engines cost what 10 Tesla S's cost), tend to not be swayed by the marketing fluff and claims on the side of the bottles. Their engines cost a fortune to buy, and taking them down for maintenance is equally expensive. They want something that works...and when they find it, they stick with it; they don't go with the latest fads. Shell Rotella is one of their favorites.
Every motorcycle I bought, I intended to keep forever...or at least 100,000 miles. My current bike has more miles than any of the others at just shy of 50K. I don't plan to ever sell it...but I wouldn't be surprised if I find another bike that catches my fancy and I buy it. My point is that it makes no difference if this bike could make 150K with Shell Rotella T6 or 200K with XXX brand oil. Who cares? I'll never have it. And none of the people who bought my previous bikes have put on more than 10K on the bikes since they bought them. They'll never see the end of life for this motorcycle.
The ST's have remarkable longevity. That was engineered into them...by Honda engineers.
Chris