New radiator question

[Dakar Timm]

I spent several years developing antifreeze formulas for Peak, Prestone, etc. Tap water makes your radiator corrode faster. Well water is the worst. Distilled, deionized or RO (reverse osmosis) water only cost $1/gallon. Use good water

Thank you everyone for taking the time to answer . At least now. I know .
As an aside . The pure or concentrated coolant was $5.00 a gallon cheaper than the pre mix . Go figure .

 

[GTXDAN]

Along with straight anti-freeze and distilled water, I throw a bottle of this in my GTX with the al rad so it will last a long time. This stuff has been around for a while and works good at preventing corrosion. Put it in trucks and tractors with big diesel engines to stop corrosion of cylinder liners. Works good.