my mate has a focus (99 plate) now the problem is that on the way home one nite it started to die so he got it home(just) i popped round and he had taken it to a local garage who done a diagnostic check on it and they said the coil pack had gone so they replaced it and it made no difference so to cut a long story short he got the car back from them and i popped over and did a compression check and cylinder 1 was nothing and the rest where fine when the plug is out and you look down the plug hole it is full of oil..... what would have caused this ...rings? valves? can anyone help...many thanks lee.