> Adding a wetting agent to your coolant will NOT change the operating
> temperature of your engine, that is controlled by the thermostat(s).

This is true only while operating in the temperature/work load range in
which the thermostat will cycle between open and closed.... Beyond this
range, when the theremostat is always open, the thermostat does not control
the temperature of the engine; at this point the temperature will be
controlled by the cooling capacity of the cooling system.

The coolant flows more easily,
> allowing more heat to be transferred between the surface and the coolant.
> In the engine this is good because the coolant can take away more heat, in
> the radiator and heater cores this is also good because the heat in the
> coolant is transferred more efficiently to be dissipated by the air
> passing over the core.

This is why, in the upper ranges of air temperature and work load (when the
thermostat is constantly open), the wetting agent will lower the maximum
temperature that the engine reaches.

> I have NOT seen any change in operating temperature
> of my engines under normal operating conditions,

Then I doubt you have used the wetting agent in a fully loaded Westy going
up a steep hill in 110 degree weather...

Bill