The mention of KMnO4 and antifreeze had me recalling a survival technique: Chemical Fire

The reactionary qualities of Potassium Permagnate as well as Iodine are only present in concentrated quantities. Iodine is actually very unstable (as is Potassium Permagnate) in crystaline form.

DCA4 contains a minute amount of Potassium Permagnate. What Potassium Permagnate does is it breaks the surface tension of the antifreeze/water solution and allows the solution to make a 'slippery' contact with the internal metal parts without oxygen bubbles that are inherent in normal antifreeze/water solutions. Those 'bubbles' attach themselves to internal metal surfaces mand effectively insulate the thermal transfer of inherent heat to the antifreeze. This is especially true of linered engines where air bubbles on the liners can and will cause 'cavitation', the result is a pinhole in the liner as the bubble explodes (from localized heat) and creates a crater on the liner surface. The process repeates itself over and over creating the pinhole. Watter Wetter does esentiall the same thing for a elevated cost.
 
Ethylene glycol is the same no matter who sells it. They sell it pre-mixed 50/50.
 
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