I have what I believe to be an oil leak. I smell oil burning, and smoke comes of the passenger side fender well. I can't see any leaking, but I do have drops on my driveway. I just bought the car, so I don't know how much oil it goes through. I originally thought that it was burning off extra that I may have dripped when I changed the oil. It was idling high, but I cleaned the mass air sensor, but that has stopped. Any thoughts?