[dwtaylorpdx]

There is a product that's a zero pressure product. You actually run a special radiator cap that allows direct venting to the overflow tank. The coolant is installed straight with NO water. its also essentially a lifetime product, Its used in some over the road trucks.

Its like 30 bucks a gallon. But if its permanent.......

While the wax has cool factor its going to raise the price, and you'll have the issue of how fast you can get the heat back out of it. A storage tank would be faster for quick warmup. (I think...)

Great idea !
Dave