Hello Folks. Me again.
There is no smoke coming out of the tail pipe and there are not oil drips under the car.
Yesterday I went to the dealer and I was asked the same questions: no smoke.
The dealer told me to check the oil level every 2500 Kms and to add the 500cc that it needs. It is normal for a car of that age and milage to burn a liter every 5000 Kms.
The noise has not been back and the oil level is back to the full mark. I was told that the top of the engine might have been a little dry due to the missing oil and this was the reason for the initial noise and that after then oil reached that part (1 or 2 seconds later) the noise was gone.
"Keep your eye on it!", he said. I sure will!
Cheers!
mar