... could be reaching way out there, but has the car been setting for awhile and not started... say for a year or so? Sometimes if a car will set for a long time without being started, it will smoke for awhile.

My old 1984 190D smoked like crazy when I first bought it, but it had not been driven for a couple of years as the PO had deceased and his wife parked it in the garage. ALL fluids and filters were changed, but it still smoked.... but after about 250 miles, all smoking went away... it was a diesel though, so not sure how much a gasser would ease the smoking in that amount of time.