1.8L / 2.0L Duratec Petrol Engines (Mondeo Mk3)
I found oil on one spark plug when I replaced them the other day. From what I can tell with the power of google (and asking a mechanic!), and combined with a very slow oil leak and sooting of the exhaust, this is likely to be all cured by replacing the rocker cover gasket.
I don't have a...