[nUcLeArEnVoY]

I use Rislone super coolant since it's the only coolant additive that actually matches the color of the conventional green coolant, so it doesn't discolor it - finicky, but I'm OCD.

All of those additives work by the same principle in that they make the coolant more "soapy" and hydrophilic, so that it more readily sticks to the metal surfaces and transfer the heat more effectively.