hi guys, my oil level warning light came on the other day so i got some oil and topped it up.as i was doing this i noticed that there was a light brown goo on the oil cap and a bit on the dipstick. this might be a stupid question but im gona ask anyway. is there any way that water could have got into the engine without it being the head gasket?the coolant in the radiator bottle is still as it should be so does that mean its not the head gasket? someone told me at work that there was a fault on one of his mates audis that caused water to get into the oil? any help is much appreciated.