Not enough octane? what you guys think?

POS Dakota said

I think you should be running at least 91 also.
Have you tried it????

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no, not yet....but what is the reasoning for it..

i feel like people just put in the higher octane for the hell of saying "i run 91 in my car"...if it runs fine on the 89, why does it need higher?

im just looking for a reason as to why its better or facts to prove it