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JIM THEO · 11-03-2018, 08:33 AM

It seems for me better solution than a lower thermostat or additive to just add some more de-ionized water in my antifreeze!
Subaru uses "Super coolant" that is 50-50 water-ethylene glycol mix for -32C degrees and the lower I have seen locally the last fifteen years is -12C degrees thus adding at 7.5t antifreeze of the car say 750ml (10%) de-ionized water will increase cooling capacity without creating problems the winter, I am thinking of a 60-40 water-ethylene glycol mix what do you guys think?

11-03-2018, 08:33 AM	#15
JIM THEO Senior Member Join Date: Feb 2018 Drives: BRZ 2018 Location: Greece Posts: 496 Thanks: 119 Thanked 137 Times in 96 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	It seems for me better solution than a lower thermostat or additive to just add some more de-ionized water in my antifreeze! Subaru uses "Super coolant" that is 50-50 water-ethylene glycol mix for -32C degrees and the lower I have seen locally the last fifteen years is -12C degrees thus adding at 7.5t antifreeze of the car say 750ml (10%) de-ionized water will increase cooling capacity without creating problems the winter, I am thinking of a 60-40 water-ethylene glycol mix what do you guys think? Last edited by JIM THEO; 11-03-2018 at 08:49 AM.