I am now really curious if this is nothing more than just Seafoam?
I know with Yamalube oil, they charge and arm and leg for it but there is nothing more special about it at all. It's made by Citgo or Nippon and if it didn't have the Yamaha logo on the outside of the bottle, it would be $8-$10 dollar a ltr oil at best and not the $21 they like to charge for it.
I have ran Seafoam for years in everything I own and haven't had a lick of trouble with any of them. Snowmobiles, boats, lawn mowers, snow blowers and of course vehicles.
It's cheap mtce imo.