Hey guys,
I dropped the oil in my t18 yesterday, and under the oil cap was a light brown oily mixture. the oil itself was fine, and black. as it would be, since it was 5000 km overdue for a service when i got it. I've heard that if this happens, it maybe a blown head gasket. it only blows water vapors when cold. Basically my two questions are:

1. Is this a sign to a blown head gasket?
2. Would there be anything to worry about if it isn't a blown head gasket?