I recently bought a Y reg Astra Mk4 1.6 8V. All seemed to be fine but i have now noticed that it seems to be leaking oil from the bottom of the engine. Not knowing anything about cars myself i asked a few questions and I was advised to check the oil cap for air bubbles as the head gasket may have blown. When i did i noticed there was a milky residue on it.
Having looked through the forums the milky reisdue seems to be common with this model of car when only short journeys are done, but there was no real mention of oil leaks. Does this mean that it is likely the head gasket has gone or are there other signs i could look for before taking it to a garage?