Porsche 911
991.2 (2016–2019)
9A2 flat-six · 3.0 L twin-turbo (2016–2019)
Oil Specification
Grade
Mobil 1 0W-40
Capacity
8.75 L (with filter)
Porsche Spec
Porsche C30
Service Schedule
Engine oil & filter
Turbo cars benefit from shorter intervals — consider 6 months or 7,000 miles for hard use
1 year / 12,000 miles
Brake fluid flush
2 years (regardless of mileage)
Auxiliary drive belt
8 years / 80,000 miles
Pollen filter
2 years
Air filter
4 years / 40,000 miles
Spark plugs
4 years / 40,000 miles
Coolant flush
4 years, then every 2 years
PDK fluid
4 years / 40,000 miles
Turbocharger oil feed lines
Degraded lines can restrict oil flow to turbos
Inspect every 40,000 miles
Known Issues & Watch Points
Bore scoring resolved
WatchThe 9A2 turbo engine largely resolved the bore scoring issues of the 9A1. However, turbocharged engines are more sensitive to oil quality and change intervals. Using the correct specification oil and sticking to annual changes is especially important.
Turbo wastegate rattle
WatchA cold-start rattling noise is common on early 991.2 cars — caused by worn wastegate actuator bushes. Often more of an annoyance than a reliability concern, but worth monitoring and replacing if it worsens.
PCM software updates
WatchSeveral software updates were issued during 991.2 production to address throttle response, PDK shift behaviour, and Sport Chrono calibration. Confirm update status with a Porsche dealer.
Intervals are general guidance. Always refer to your car's Maintenance Booklet and consult a qualified Porsche specialist. Known issues are documented based on commonly reported patterns — not every car will be affected.
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