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The Engine Masters TV series did a whole show testing different octane fuels on the dyno. There was no noticeable difference in the torque/power numbers between them even when the timing was adjusted to optimum. The only benefit of higher octane was knock/ping resistance. So, according to them, if the engine is not knocking/pinging when you use it, higher octane fuel is pointless.
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Tommy
Cheetah tribute completed 2021 (TommysCars.Weebly.com)
Previously owned EM Cobra
"Never attribute to malice that which is adequately explained by stupidity." - Hanlon's Razor
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