help oil EVERYWHERE

Ok so my friend was driving his 89 lebaron 2.5 turbo whe it stalled out and we had to sit there for like 5 minutes before it started. when it started it ran like shit, it stuttered and seemed like it was misfiring alot and we got it to my garage where it leaked a nice little puddle of oil on the ground so we pop the hood and the airbox has between a half and full quart of black oil in it. i think this caused the plugs to foul and thats why it seemed to misfire but what could the problem be?

Hey bro, I got an 89 turbo 2.5 too....I'm almost positive the turbo seals are bad because when I step on the gas and the turbo boosts up and then let off, a HUGE plume of smoke comes out of the exhaust and it has the same stuttering symptom. Maybe your buddy has the same problem. I got a reman OEM turbo coming in tomorrow and I'm going to replace the old one on Saturday. I'll let you know what happens.....