oil leak xantia

[timbo]

Hi all, i'v got a oil leak that i can't trace, it pool's behind the starter motor,at first i thought it was comeing from the dip stick tube but on checking with a mirror there's no oil that i can see above,could it be blowing back from the sump, it's not a huge leak but i would like to cure it. (8v 2.0 )

[Fox]

I had a leak when I forgot to replace the washer on the sump plug after changing the oil. Perhaps this is something to check?
1994 Citroen Xantia SX 1.9 Turbo Diesel
148,500 miles