An overview of the service intervals applicable to your Porsche is available in the "Warranty and Maintenance" booklet in your vehicle document wallet. Your Official Porsche Centre will also be happy to answer any questions and provide information. Some plans can be downloaded here:
Porsche tyre approvals
You wouldn't let just anybody drive your Porsche.
Porsche is one of the few car makers to undertake extensive tyre development and testing, and publish regular manufacturer approvals for summer and winter tyres for all new vehicles. Here's an overview of the relevant approvals in PDF format.
* The published fuel consumption and CO2 emissions figures are determined by Porsche AG laboratory testing in accordance with ADR 81/02 on test vehicles. Actual figures will depend on many factors, including without limitation: road and traffic conditions, fuel quality, environmental conditions, individual driving style, vehicle load, vehicle condition and use (including any additional equipment and/or accessories) and how the vehicle is driven. For hybrid or electric vehicles, CO2 emissions can also be generated at the power source when vehicles are being recharged, unless 100% renewable energy is used. Generally, fuel consumption and CO2 emissions will differ from the published figures in real world driving conditions. Published figures should only be used for the purpose of comparison between vehicles.