Well ,put a mechanical temp gauge on it and she runs right under 200, i guess the electronic gauge (cheapie) i had on there was off!

Specific Heat Capacity of Ethylene Glycol based Water Solutions
Specific Heat Capacities - cp - of ethylene glycol based water solutions at various temperatures are indicated below
Specific Heat Capacity - cp - (Btu/lb.oF)
Temperature Ethylene Glycol Solution (% by volume)
(oF) (oC) 25 30 40 50 60 65 100
-40 -40 1) 1) 1) 1) 0.68 0.703 1)
0 -17.8 1) 1) 0.83 0.78 0.723 0.7 0.54
40 4.4 0.913 0.89 0.845 0.795 0.748 0.721 0.562
80 26.7 0.921 0.902 0.86 0.815 0.768 0.743 0.59
120 48.9 0.933 0.915 0.875 0.832 0.788 0.765 0.612
160 71.1 0.94 0.925 0.89 0.85 0.81 0.786 0.64
200 93.3 0.953 0.936 0.905 0.865 0.83 0.807 0.66
240 115.6 2) 2) 2) 2) 2) 0.828 0.689
280 137.8 2) 2) 2) 2) 2) 2) 0.71
1. below freezing point
2. above boiling point
• 1 Btu/(lbmoF) = 4,186.8 J/(kg K) = 1 kcal/(kgoC)
Note! The specific heat capacity of ethylene glycol based water solutions are less than the specific heat capacity of clean water. For a heat transfer system with ethylene glycol the circulated volume must be increased compared to a system with clean water.
In a 50% solution with operational temperatures above 36 oF the specific heat capacity is decreased with approximately 20%. The reduced heat capacity must be compensated by circulating more fluid.
Automobile antifreeze solutions should not be used in HVAC systems because they contain silicates that may cause fouling. Silicates in automobile antifreeze are used to protect aluminum engine parts.
Note! Distilled or deionized water should be used for ethylene glycol solutions. City water may be treated with chlorine which is corrosive.
Systems for automatic makeup water should not be used since a leakage would contaminate the environment and dilute the antifreeze protection of the system.

So am I kinda right?Very interesting,Thank You.Guzzi Mark