God i hate reposting on my own news posting but here goes: Fluid XP uses iridium, and 1-dodeconel(SP?) in there fluid which completely removes the non-conductive and non clogging/corrosive properties. Go find a review on there colored liquid.
Personally i have had friends not change there liquid for years and this fluid still operates extreamly well. They have recently changed there formula from Ethelyn Glycol to Propylene Glycol, thus the non toxic.