just keep an eye on it because at that mileage the intake can leak coolant internally into the engine, so if water keeps disappearing with no explanation or external leaks it could be the valley pan issue. Other sources for leaks at that age / mileage are the water pump, aux water pump / heater control valve, expansion tank, upper radiator hose, and water cooled alternator on the V8 models. Look for possible leaks around those items.

That said - probably just the climate changing or something - I added about a cup of distilled to my system just last week, although no warning light had come on or anything - it just looked a little low to me. I hadn't checked it in a while.

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2003 4.6is - SOLD
2003 M5 Imola
2008 Mini Cooper S
2011 Mazda CX9