Yamalube additive for engine

[Steelbreeze]

What’s the deal with the Yamalube fuel stabilizer and detergent for ethanol containing gas (E10) Seeing some info that doesn’t tie with the must use info and Yamaha literature. 175SHO saying 89 octane do I need this additive for every refill? Thanks in advance

 

[Bill N]

Higher octane equates to resistance to detonation. Detonation is terribly destructive when it is not when it is supposed to be.
For cocktail cruising you would probably be fine, but if working the engine at all, you need to keep your octane in the recommended range.