Lowering temp.?

Has anyone tried royal purple ice, water wetter or something like this to lower coolant temp?

I tried this one time in my ATV, it helped some. Dropped a few degrees but nothing substantial. I have drilled more bleed holes in the thermostats and this will allow it to run cooler. 4 or 5 extra holes the same size as the bleed hole thats in it will drop 10 degrees from what I have seen.
 


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