aside from regular coolant, do any of you use Water Wetter or other items?

I've used WW and HyPer Lube in my daily drivers and they do tend to keep the temps 5-10F cooler than without...



Rislone Hy-per Cool Super Coolant, 16 oz.

Red Line (80204) Water Wetter - Coolant Additives - 12 oz Bottle

Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz.

Mishimoto - MMRALC Liquid Chill Radiator Coolant Additive


I plan on just adding distilled water for the first start, and will probably add one of these to the mix. Any feedback?