I think it’s the other way around. Startron probably makes Yamahas product for them. I can promise that Yamaha doesn’t make it. They make a LOT of stuff, from motors to drum sets, but I don’t think they’re in the refinery business.
Ring Clean also decarbonizes. Interestingly, it says to put it in your gas every four or five gas ups. I always use Ring Free in every gas up. I may be over doing it.
people will cringe, but I have not used ring free at all in my SHO since I bought it new in 2016.
I agree with the comment above, why change if its been working? Cheaper may not always be better. My mechanic told me if I do use something to stay with it and not to change it up over time. just my thoughts.