[Y-Blockhead]

Originally Posted by LeonardS

According to that chart, we should run straight antifreeze in the summer and 65% antifreeze in the winter?

If you want to do that, go ahead if you think your engine will ever get to 392°F. Most of our engines run about 200°+ lower than that.

To the rest of us in the real world, my point was adding anti-freeze does, in fact, raise the boiling point of the coolant.

Originally Posted by Antique_iron

A 50/50 mix does not raise the boiling point. Only a closed pressurized cooling system will raise the boiling point.

Originally Posted by Ramman

Again, I'm betting the chart is for at least a 16# pressurized system.

I was responding to Antique_iron. I didn't mention anything about pressure.