Quote:
Higher octane than necessary reduces efficiency, as the burn is cooler. Increased octane is of no benefit if there is no pinging/detonation or the ignition can't be advanced to take advantage of it.
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I agree with the second part, but do you have a source for the
"Higher octane than necessary reduces efficiency, as the burn is cooler. "
part. I would have thought the flame temperature would be controlled by only the heating value of the gasoline, and the amount of air in the mixture. Unless you meant that the heating value is reduced by WHAT they add to the gasoline nowdays to make the octane higher, since sadly that yummy tetra ethyl lead is no longer available.
