On Thu, 13 Dec 2007 04:00:58 GMT, "Cy Galley"
wrote:

No extra heat in high Octane. Same hydrocarbon structure is both. Same
BTUs. Only difference is the speed of combustion is controlled so it is
slower in the higher octane to prevent pre-ignition.



Cy

I'm on your side. See my prior post.

Lot of people are using different words to describe the same thing
which may be part of the problem.

Big John