had the same problem with mine, second from the left had a load of oil in it,
think its a common problem
what u do to fix the problem mate?
When i did a service on my old fiesta spark plug 1 and 2 were covered in oil. Turned out all it was was that when the previous owner had done a service on it when he had changed the spark plugs he didnt put the ht leads on them and when filling it with oil he spilled some down the holes of spark plug 1 and 2.
Was the oil on the spark plug above the thread on it or all over it?
it was full.. 3 of the plugs didnt have drop in just 1 which was near enough to the top