Yes, this has probably been asked an many motor forums. I have a motorcycle that says use 87 (GSX 650F) as did my Ninja 250R
The reason I ask opinions (and facts) is that many say, use lower octane as its a waste of money payng more for higher octane as it does not deliver more power. It apparently burns slower and cooler.
From my experience in a Honda Prelude, many moons ago (1984 model) I found the higher octane was peppier and drove further, and roughly same cost as lower octane (cheaper but less range)
Thoughts?