wstar - It's my understanding that the ECU will try to advance the timing above the base timing until pre detonation is detected, at those points it will pull the timing back until things settle. The higher octane allows the ECU to set slightly more agressive advancement timings throughout the maps.
I did a bit more research into octane and North America uses a different standard of octane measurement compared to the rest of the world. Classic.
Most of the world uses the Research Octane Number (RON)
...but North America who uses any combination of these - Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2.
So, I guess a 95 American octane is probably equivalent to RON 98.
I'll still run a baseline power run on RON 100 to see how it goes.
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