[Del in NE Ohio]

Our Great Race team used it in our '29 Tudor during 2019 Great Race as "insurance policy" as we ran across Southern California desert, over Cajon Pass, and then over Donner Pass in late June. We were running a non-pressurized Berg radiator. Only a couple of times did coolant temp go over 170 degrees (Stewart Warner temp gauge) and we were working that motor pretty hard. Expensive? yes. I would not use it in an attempt to compensate for cooling issue(s). Prior to our decision to "invest" in this product, we talked directly to Model A drivers in South Texas who drive their "A's" in 100+ degree heat with no worries with Evans Coolant.

PS The back cover of Snyder's 2020 catalog shows a photo of our car reaching the summit of Donner Pass.