If I remember correctly I prediluted it in the distilled water and put it in. I think it used most of it so I just poured what little bit was left in there. Not sure though, it has been FOREVER. When I get home I will certainly look into it. :thumbsup:you used the whole bottle? I only use like 6-8 capfuls only of water wetter per cooling system! Isnt that what it says, 2-3 capful per quart?