Was doing my usual check around the car yeasterday and noticed that that brown/white oil mix you get was collecting round the breather hose. So naturally I assumed the worse and took a look in the header tank.

Not a hint of contamination in there. So had a look under the oil filler cap, and not a hint of it there either.

Could it be the head gasket on its way out? but surely if coolant is leaking into the oil wouldn't the oil get into the header tank to?

Anyone got any ideas on what it could be?