[Spartarus]

So, I don't know if this is definitive but here goes.

I lived in NY and AK, never used a drop.

Moved to Miami, leave town for several weeks for work, car parked outside in the sun. Return to find the coolant bottle a little lower every time... And it's not like I'm driving it when I'm gone.

The water is evaporating, because the bottle isn't sealed.

I take the thing apart on a regular basis. Never found any coolant residue anywhere it doesn't belong.

I've used a few cups of distilled water in a year, both turbo and not.