Carpokes

Does anyone know this?
I want to stop my 911 for a while and now my question is what is best theTank all full or not at all ?
And then my other question is what should I add to the fuel and how much?

The common answer to this question has more parts to it:
1. Fill your tank completely
2. Add some fuel additive to slow the degradation of the fuel such as Sta-bil
3. Use a battery tender that supports variable trickle charging cycles to charge and discharge your battery over winter
4. Tires need to either be over inflated or use a product to "cradle"your tires to support them and prevent flat spots
5. Clean and cover your car with a high quality cover
6. Take precautions against rodents (unless you are sure your garage is 100% sealed) such as dryer sheets in exhausts and spread around different parts of the car - moth balls work too
7. Use some moisture bags inside the car if you don't have a good climate controlled garage to preserve the leather and other moisture sensitive components inside the car

Hope this helps

Thank you very much for this complete answer