Porsche recommends the following scheduled maintenance intervals for the 6th generation 991:
Oil Change: The engine oil should be changed approximately every 10,000 miles or once a year, whichever comes first.
Air Filter Change: The air filter should be inspected and replaced if necessary at the 40,000-mile mark and then approximately every 40,000 miles thereafter.
Spark Plugs Replacement: The spark plugs should be inspected and replaced if necessary at the 60,000-mile mark and then approximately every 60,000 miles thereafter.
Fuel Filter Replacement: The fuel filter should be inspected and replaced if necessary at the 60,000-mile mark and then approximately every 60,000 miles thereafter.
Brake Fluid Change: The brake fluid should be flushed and replaced approximately every 2 years to maintain optimal braking performance.
Drive Belt Replacement: The drive belt should be inspected for wear and replaced if necessary at the 60,000-mile mark and then approximately every 60,000 miles thereafter.
Coolant System Replacement: The coolant should be replaced approximately every 4 years to ensure proper engine cooling.
Transmission Fluid Change: The transmission fluid should be inspected and replaced if necessary at the 60,000-mile mark and then approximately every 60,000 miles thereafter for manual transmissions. Automatic transmissions typically require fluid and filter changes every 40,000 miles.
Timing Belt Replacement: The 911 991 models typically feature a timing chain rather than a timing belt, so no specific interval is provided for timing chain replacement.
Maintenance for other Porsche Model Years
For other information on Porsche maintenance, service, and repair, or for the service schedule for later model years, please see our other Porsche articles.