No-Rosion?

[storm9c1]

Agreed. Antifreeze + distilled water is all that's needed. Antifreeze contains corrosion inhibitors. 60/40 recommended in northern climates. No more, no less. A stronger antifreeze mixture hurts more than helps since the water is needed to carry away the heat more efficiently. Antifreeze alone cannot do that and works with water. But a 60/40 mix is better insurance. A frozen block is bad. A cracked block is a boat anchor.

That being said, No-Rosion is a decent product. It wasn't exactly developed for car radiator systems. But works there. I prefer to change and flush the cooling system every 3-5 years anyways, and that seems to keep cooling systems happy over the long term. The biggest enemy is neglect no matter what you use. The No-Rosion site also recommends this change interval even with their product. Once place it does excel is in systems that spend lots of time sitting (ie: museum vehicles, etc).