Porsche 911 Carrera - Manual (Page 239)

3. Unscrew cap of the oil filler opening.
4. Add at most 0.5 quarts (0.5 liter) of engine oil
at a time.
5. Measure oil level again with the on-board
computer.
6. Add more engine oil if necessary. Never add
more engine oil than required to reach the
max. mark.
7. Carefully close cap of the oil filler opening.
8. Push oil filler tube into its holder until it snaps
into place.
Maintenance, Car Care
237