Mike, JP and all,
I have seen very few if any pitted liners on motors that have used either a glycol mix and cca's or extended life
antifreeze that was properly maintained and either recharged in the case of the extended life or changed, flushed and refilled in the case of the glycol mix. Motors with water only(no
antifreeze) and cca charged coolant filters have some protection but still will fail prematurely. Systems with water only will fail rapidly. JP, the biggest problem with the iron rust in your engine is not the liner failure as in the diesel, but rather the radiator and heater core it clogs and the waterpump seal and bearing it abrades. Also, most head gaskets have some type of steel shim. Even if it is sandwiched between layers of something else it can rust out and cause serious engine damage. You are correct in your summation of the Evans product. You must have a correctly sized (or oversized if you like) system to overcome it's reduced ability to carry heat but the engines coolant must do more than just cool. I was always speaking in "Ideal" situations when I was extolling the virtues of Evans. I, also have an less than ideal cooling capacity but I am working on that problem with better hardware as I do not feel running straight water is a viable option. Are we becoming friends? P.S. I lived in the Detroit area for 18 years during my drag racing heyday. I have raced at some of your local strips-Norwalk and Columbus to name a couple.