coolant finding its way to mix with engine oil?

[wonghoiman]

My 2000 Boxster S's low coolant light flashes yesterday so I checked the coolant level in the back. It wasn't that low below the min level, but I ended up adding almost 2-3 quarts to the coolant tank to the mid level between min and max.

But today the warning light flashes back on and the coolant level is back down to yesterday's level again! The funny thing is my oil level(according to dip stick and electronic checking) both says the oil level is over the top! (the electronic gauge used to be at mid level, now is one bar over the top)

Does anyone have that issue? Perhaps coolant finding its way into mixing with oil? My 2-3 quarts of water ended up in the engine...

And does anyone knows what color is the coolant for 2000 boxster S made in Finland? my color is like brown which i think isn't right...