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I never really understood this type of test, seems to me that a liquid that was really bad at absorbing heat would read a LOWER temp, and the heat would just dissipate another way. Can't believe there is a way at these temps to absorb heat at one rate, and dissipate it at another rate.

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I think it more about the transfer of heat/energy. The liquid mix in your cooling system transfers removes heat from your engine to the liquid mix. Then when it passes through the radiator it transfers the heat to the air through the surface area of the radiator fins.

It's from my old Thermodynamics 360 class that I C=can't remember all the detail. Steam table, Q-in Q-out, yadda yadda yadda....