Well explained Tizzy. I for one many years ago did not understand octane ratings either. When I would occasionally try high octane fuel in my vehicles with absolutely no noticeable performance gain....I was perplexed. Years later I understand that my vehicles were designed to run on 87 octane and most likely would [I]never[I] benefit from anything higher.
I use 87 in all of my lawn equipment. I have tried 89 in my Red Max trimmer and Husqvarna blower and cant tell any difference.