you gotta find out where the oil is coming from, could be anything. if you went into this far enough where you did your own work i would suggest wiping everything underneath the engine with rags and gasoline and clean the underside up as best you can, then start the engine and let it run for a few minutes, shut it off and then get underneath and look with a keen eye, and good flashlight. If you have that giant pan underneath you have probably already removed it. on my 1990 300TE when i removed that pan i found dead bodies and parts of the titanic laying in there...a virtual mechanics graveyard of assorted tools, nuts and bolts. at any rate, you gotta be sure where this is coming from exactly, if it's that noticable it should be easy to find, but you gotta clean everything up first. can't tell where the soldier is shot and bleeding if there's blood everywhere....good luck