95 deville oil leak

Help! I,ve changed the oil pan gasket, the valve covers gasket and it still leaks and I can't find the leak.

The leak could be the case-half seal. You might want to buy some oil UV dye to put in the crankcase. Once the dye circulates in the oil you can detect the leak by using a black light. See link below:

http://www.amazon.com/exec/obidos/tg/detail/-/B0002T5H8Y/qid=1102961111/br=1-6/ref=br_lf_hi_6//102-8797304-6693735?v=glance&s=hi&n=3753001

The leak could be the case-half seal. You might want to buy some oil UV dye to put in the crankcase. Once the dye circulates in the oil you can detect the leak by using a black light. See link below:

http://www.amazon.com/exec/obidos/tg/detail/-/B0002T5H8Y/qid=1102961111/br=1-6/ref=br_lf_hi_6//102-8797304-6693735?v=glance&s=hi&n=3753001
Thanx M.A.C. I will give it a try, I'll let you know what did I find.