There is no reason NOT to use a water wetter type product other than the $9 or so. Use the antifreeze level percent needed in your area to protect…at the lowest temp possible in your area. It will help by a few degrees with anti-freeze coolant…which when fresh has all the anti corrosion and water pump lube etc needed. It works best with water…race cars do not use slippery when leaked antifreeze. Oh my…another wild topic…as with zddp, synthetic oil, ethanol…Water Wetter (a brand…there are others) is widely used in race cars…note that as a surfectant…it aids in transfer of engine heat, to the coolant…then aids a bit (less so) in transfer of coolant heat to the air…via the radiator…but the net effect is a cooler engine…when…sufficient air is thru the radiator to remove the heat…and the system is in optimal condition. I certainly don't think it will hurt anything. I haven't used water wetter in over ten years, but I had pretty good results with it on naturally aspirated engines. It seems perfectly harmless in any case, except for the (nominal) cost. 2 I don't think you should go below a 180 degree thermostat on anything with fuel injection unless it's a racecar. I suppose it’s effect will depend to some extent of the condition of these surfaces, and thus will vary. It reduces the surface tension of the coolant, so that the water forms a more “intimate” contact with these inner surfaces. Purple Ice is most effective when added at a 1 ounce/ quart ratio. Extensive testing has confirmed Purple Ice to reduce coolant temperatures up to 10. Water wetter works on the inner (coolant-bathed) surfaces of the block and head. Purple Ice is the ONLY coolant additive on the market that passes ASTM D-2570 Simulated Service Corrosion Tests in a straight water mixture.
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