[Diy_efi] The Hunt effect

[Ashley Evans]

dh at busb.com wrote:
> As a general rule, not to be taken all the time.  The heavier the fuel the
> higher the energy available.  So yes, the heavier fuel might result in more
> heat in the engine.  Diesel fuel has more BTU's / gal than gasoline.

What do you mean by "heavier" fuel?  Just higher Octane level?  From 
what I've been lead to higher octane just reduces the likelyhood of 
detonation allowing more compression/advance.  Does the octance rating 
do more or do you mean something else by heavier fuel?

Ashey