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2001 Prelude Type SH, 2015 Infiniti Q40 AWD, 2017 Honda Pilot Touring AWD
In short, the higher the octane, the higher the pressure has to be before the gas spontaneously ignites. The PF has a "high compression" engine, and using low-octane gas could cause the fuel/air mixture to ignite before the spark plug fires. This causes loss of power and/or economy.
The web site does a much better job of explaining it, but beware, it can be addictive!
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