As I read it before & read it again...

Higher Octane fuels generally go hand in hand with higher compression engines to prevent knocking. In other words the higher octane is not "better" but rather needed to prevent damage.

Notice that the article makes no mention of specific numbers defining what number constitutes as "higher" compression. This is to prevent consumers from determining by themselves whether the compression ratio of their vehicle is high enough to warrant higher octane fuels. So follow the users manual, specially if you didn't engineer the engine you just purchased.

Again... Follow your owners manuals... If you find that your manual is stating Euro RON octane ratings then you need to find its equivalent using the US standard (R+M)/2 octane formula... For example... my Z calls for 91 RON, clearly Euro since none of our pumps here use that method. A little research & I found out that 91 RON is the equivalent of 87 PON in the US... (R+M)/2=PON

FYI... if in your purty little head you feel better about using higher octanes when your motor isn't designed for it then you have bigger issues...