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Originally Posted by tong
zerex blows. leaves residue everywhere.
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Your actual experience with ZRC? Or repeating what you've read elsewhere?
If it is your own experience, what percentage were you using? Other details?
FWIW, I've used it at 10% solution (spec'ed by Valvoline at this concentration for automotive applications) in a number of systems and have not seen this - but maybe I was just not looking in the right place.
WeaselBlade is using it at something like a 13% or 16% solution (allowing for both US and UK ounces) which doesn't sound way off what I've been using. Cooltechnica recommends 5% (thermochill too, I think) or about a third of what's being used here. Maybe there's an issue with over 10%? I would
guess, though, that it's something else. Are the particles hard or waxy? What happens when you run straight distilled water? Speaking of which, where did you get the distilled water?
As a side issue, yes ZRC is pink. Automotive coolant additives tend to be color coded so a tech can be sure to top up with something compatible (or a race tech inspector can be sure you aren't running anything with glycol which is banned on many(all?) tracks as if it spills it's horribly slippery and must be thoroughly
washed off - fuller's earth won't cut it)