I've noticed in the past couple of weeks that the oil filler cap on my S3 has white deposits on it. I know that this is normally the sign of head gasket issues but I've also heard it can be caused by short journies in cold weather ( condensation mixing with the oil ? ) My car has used no oil or coolant since new and it runs fine. Could the deposits be a symptom of my 7/8 mile town journey to work and cold weather? There is no gunk or deposits on the dipstick or in the engine ( what I can see from the oil filler cap ), it's purely on the underside of the oil cap. Anyone else had this?