Posted for George Braly <gwbraly@gami.com>:

Fuel doesn't cool the engine.  Fuel alters the burn rate and that alters the location (in relation to TDC)
of the 50% burn time for the charge - - and that alters the peak combustion
pressure and temperature - - and therefore, the rate of heat transfer into
the cylinder. One can get into all sorts of misunderstandings if one treats fuel as a
coolant, rather than something that modifies the rate of burn of the charge.

Regards,  George