Mine was a leaking valve cover gasket. I have a '67 so it doesn't have the 2 front bolts on the valve cover. The gasket slipped out just a little and the fan sprayed it all over the engine apartment. What a mess!!!! I feel your pain. Oil leaks are messy, but they get real messy when the fan is involved.
Thanks, I'll find out next week when I work on her.
1985 Alfa Romeo Spider Veloce