Quote:
Originally Posted by patchesj
All things equal, higher octane will decrease power. The only benefit to running higher octane levels is if you increase boost or timing to take advantage of the detonation resistance of the octane levels. So if you weren't already having knock issues, this result is expected IMO. There is an entirely different discussion regarding fuel chemistry vs power, beyond just octane measurements.
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All things equal this is true but the M6 can read octane and adjust accordingly. Even on stock tune you can increase the octane and the benefits are noticeable. Confirmed with my tuner. On a stage 2 91 map I can fill up to e30 and the dme will auto adjust