Good thing you asked... Take a look at the bolts for the oil pan next time you're down there. If I remember right, there's one or more you can't get to without removing the engine. I'm not 100% sure that's the case with the 94 Seville, so hopefully someone else will chime in here. Upon closer inspection, you may find it's not the oil pan gasket at all. Search the forums for "oil leak" and I'm sure you'll find plenty of prior postings regarding half case leaks, changing oil pan gaskets, finding leaks, etc. that will help you out here. I think user PJS just did his own engine remove/reinstall for similar leaks on his 95 SLS, so look for posts from him in particular for good info.
Good luck...
M C
