No, this is not a problem. It is actually normal in modern car with high compression engine.
Many high compression engine with Solenoid hydraulic valve for camshaft control does burn a small of oil.
It is normal don't worry!
If you need further explanation please let me know.
Make sure you are using mobil 1 what Porsche recommended.
Engine oilPorsche recommends Mobil 1 Only approved in the following viscosities:SAE 0w-40, SAE 5w-40, SAE 5w-50Recommended oil viscosity ranges dependent on ambient temperature.Generally above -13 deg. F/-25 deg C SAE 0w-40, 5w-40, 5w-50 Generally below -13 deg. F/-25 deg C SAE 0w-40