Quote:
Originally Posted by alex.s
octane doesn't effect power. unless you don't detonate or predet. neither of those would be happening in a healthy engine.
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Yes it does. Using higher octane than required to
just barely keep it from detonating will cost you power in all situations - stock or modified.
The link below is from an engine builder and racer that has a dyno at the shop, and also has the fastest and quickest Ducatis in the U.S.
Read the section about octane and note the words in ALL CAPS.
http://www.motorcycleperf.com/TechTips/BadGasoline.html