As far as I know, the owner only uses it once or twice a week if that and yes, it would be short journeys. My concern was a) where was the water coming from and b) could him overfilling it with a an extra 2 litres of oil damaged the head gasket? As I said, the oil in the engine was fine as...

I have been to look at a 52 plate TD4. There was a small amount of oil and water (cream) mixed around the outside of the oil filler cap on the engine cover. The screen washer jet sits directly above this so I thought perhaps that this had dripped and caused the mess. I cleaned it all out and...