![]() If some haven't used or tested it, maybe some shouldn't comment on it. The Water Wetter type stuff is over rated, stops working after the first few weeks and can dissolve paper gaskets and make them leak (like those on the water pump). I will continue to add a coolant additive. 30years, 2 million miles, plenty of vehicles. I've also never had a headgasket, waterpump, or radiator issue, which seems to be a common enough problem reported on certain makes/models that I've owned. The post-installation temperature stayed steady at 96 degrees centigrade. No negatives with RP or RL when I used them. The pre-WaterWetter installation delivered temperatures between 96 and 98 degrees centigrade (or 205 to 208 degrees Fahrenheit for the Americans). It took over 2 gallons of distilled water. The rad shop said leave the remaining 50/50 thats in your block and put in only distilled water and a bottle of Royal Purple Ice. I'd guess that localized hot spots less of an issue and average internal coolant temps more consistent. I use Water Wetter in my 442 and it has the anti corrosion additives and says antifreeze not required in warm climates. Its more about BTUs then perfectly measurable temp changes. Also, notice better heat from the heater during winter chill. My friend was skeptical until he seen what it did in my car. Less power loss(cheap me vs aggressive knock sensor and low octane fuel) and can definitely feel timing pulled as outdoor temps increase(summertime traffic.). It was on sale all last month at O'Reilly's for 7.99 compared to the Purple Ice which is twice that and I very seriously doubt it could do much, if any, better. I used most of the coolant additives over the years and some work well.ฤก80F thermosat and 210F radfan gives plenty of room for improvements in several of my vehicles.
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