Originally Posted by Lou_Boyle
+1 on Shannow's comments. The only thing to add to that is that because RO/distilled/deionized water does not have a bunch of other chemical ions in it, some of which are inherently corrosive, the anti corrosion, anti scaling and pH adjusting additives in the antifreeze can do their job unimpeded with no competition.
Right, you're absolutely correct. Coolant mfgs start out with absolutely zero mineral water and formulate their additive pkg based on that.
Simply put, if you want your coolant to perform at it's best according to how the coolant mfg designed it, use distilled or demineralized water.
+1 on Shannow's comments. The only thing to add to that is that because RO/distilled/deionized water does not have a bunch of other chemical ions in it, some of which are inherently corrosive, the anti corrosion, anti scaling and pH adjusting additives in the antifreeze can do their job unimpeded with no competition.
Right, you're absolutely correct. Coolant mfgs start out with absolutely zero mineral water and formulate their additive pkg based on that.
Simply put, if you want your coolant to perform at it's best according to how the coolant mfg designed it, use distilled or demineralized water.