most likely Valve guides normally when you drive the oil is pumped up to the top of the cylinder head, upon shutdown if you have too much tolerance in valve guides the oil will "slither" down the valve stem into the piston and wait there held by the piston rings until you crank it up and burn off on initial startup, hard to belive in such a low mileage car, I would switch to Redline Synthetic straight 30Weight oil and see if that corrects the problem

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles