I have a 1991 BMW 320I. When i turn left going at about 30 40 MPH the left front wheel shakes causing the steering wheel to shake pretty bad. turning right there is no problem. I also notice that once the car is park there is oil leaking from beside the front wheel (left Front wheel only) any idea what this might be.

Either you better Jack up that wheel and find the play or get it to a shop that will. Maybe loose wheelbearing or tierod is the first thing that comes to my mind. It doesn't sound safe in any event.