only thing i heard about using regular coolant is you need to use bike formulated coolant because of the ingredients. they differ from bike to automotive formulas. i read a little about water wetter and how it was pretty good. i am pretty OCD about maintenance. hell the bike was fully done about 2 months before i got it but i want to do a few things cause thats how i am lol. a waste of money, maybe but it helps me relax a little knowing its fresh.