oil leak

[diesel_carp]

Ive got an oil leak under the car,ts running under and dripping out of the bottom of the belly pan.its not alot but a few drips per day and its mounting up to a largeish patch now.

Ive checked the oil filter housing is not leaking and that bone dry so my thoughts are either the sum plug or the sump?

What else could it be down there that could be leaking?

im going to be looking at the car on saturday to investigate and would like to have a few things to check so i dont have any nasty suprises

The cars a 1.9CDTI 150

Cheers

[Micky86]

Turbo oil feed and return pipes.