The 911 GT3 is one of Porsche’s more rare and highly sought-after models, but we see them regularly here at HG Performance. In fact, we provide a full range of service and maintenance following Porsche’s official maintenance schedule. We also have plenty of experience with track set-up and modifications for owners looking to enhance performance or to customize the GT3 experience to their own preferences.
Use these specifications to make sure your supercar reaches its peak performance whether on the track or on the way up to Julian with the family.
All 997 GT3 & GT3 RS
Here are the service intervals you should know about your 911 GT3:
12,000 Miles or 2 Years
-Change engine oil and filter
-Flush brake fluid
-Replace cabin air filters
24,000 Miles or 4 Years
-Change engine oil and filter
-Flush brake fluid
-Replace cabin air filters
-Replace engine air filter
-Replace spark plugs
48,000 Miles or 6 Years
-Change engine oil and filter
-Flush brake fluid
-Replace cabin air filters
-Replace engine air filter
-Replace spark plugs
-Replace drive belt
-Replace fuel filter
96,000 Miles or 12 Years
-Change engine oil and filter
-Flush brake fluid
-Replace cabin air filters
-Replace engine air filter
-Replace spark plugs
-Replace drive belt
-Replace fuel filter
-Change manual transmission fluid
Service for the 991.1 GT3 (2014-2016)
Here are the service intervals for your 991.1 GT3 manufactured from 2014 – 2016:
6,000 Miles or 1 Year
-Change engine oil and filter
12,000 Miles or 2 Years
-Change engine oil and filter
-Flush brake fluid
-Replace spark plugs
-Replace cabin air filters
24,000 Miles or 4 Years
-Change engine oil and filter
-Flush brake fluid
-Replace spark plugs
-Replace cabin air filters
-Replace engine air filters
48,000 Miles or 6 Years
-Change engine oil and filter
-Flush brake fluid
-Replace spark plugs
-Change PDK transmission clutch oil
How Often Should You Change Your 911 GT3 Spark Plugs?
After reviewing the above, you may wonder why Porsche mandates such frequent spark plug changes on the 911 GT3.
There have been three engine revisions to the MA1.75 engine, the first 785 cars built used the E revision but all were recalled and replaced with the second F revision engine. There should be no E engines left as far as we are aware.
Some owners, particularly those who frequent the track and spend a lot of time near the 9,000RPM limiter have noticed misfires in the F revision engines. We’ve found valve train rocker arm defects at the source of this issue. Porsche offers all 991.1 GT3 owners a generous, 10-year, 120,000-mile warranty. If you are still within the warranty period, high RPM misfire issues may be resolved by an engine replacement to the latest G revision.
It’s important to follow Porsche’s maintenance guidelines strictly and to maintain service records so that any possible engine issues during this generous warranty period are covered. Once these issues started to become widespread, we noticed that Porsche updated its service schedule to include spark plug replacement every 12,000 miles. We suspect Porsche made this change to ensure that the engine has the lowest chance of developing misfires. Still, an engine that does exhibit misfires despite frequent spark plugs changes would qualify for replacement.
To ensure warranty coverage is maintained, we service all 991.1 GT3s with Porsche A40 approved engine oils and the recommended 999-170-153-91 spark plugs. Service records are kept on file that owners can request at any time.
991.1 GT3 RS (2016)
6,000 Miles or 1 Year
-Change engine oil and filter
-Change engine air filters
12,000 Miles or 2 Years
-Change engine oil and filter
-Flush brake fluid
-Change engine air filters
-Replace spark plugs
-Replace cabin air filters
24,000 Miles or 4 Years
-Change engine oil and filter
-Flush brake fluid
-Change engine air filters
-Replace spark plugs
-Replace cabin air filters
48,000 Miles or 6 Years
-Change engine oil and filter
-Flush brake fluid
-Change engine air filters
-Replace spark plugs
-Change PDK transmission clutch oil
How Often Should You Change the Air Filters on Your 991.1 GT3 RS?
The 991.1 GT3 RS engine air filters sit behind the rear wheels and are fed directly by the large side air intakes. Rocks and other debris will hit the air filter surface, especially if the car is driven close behind other cars at high speeds, and will start to tear through the air filter surface. Porsche recommends changing the RS air filters every 6,000 miles to ensure that they don’t get clogged by debris or tear, allowing unfiltered air into the engine.
991.2 GT3 (2018)
12,000 Miles or 2 Years
-Change engine oil and filter
-Flush brake fluid
-Change cabin air filters
-Replace spark plugs
24,000 Miles or 4 Years
-Change engine oil and filter
-Flush brake fluid
-Change cabin air filters
-Replace spark plugs
-Replace engine air filters
Manual Transmission
-Change fluid every 96,000 Miles or 12 Years
PDK Transmission
-Change fluid every 96,000 Miles or 12 Years
991.2 GT3 RS (2018-19)
12,000 Miles or 2 Years
-Change engine oil and filter
-Flush brake fluid
-Change cabin air filters
-Replace spark plugs
24,000 Miles or 4 Years
-Change engine oil and filter
-Flush brake fluid
-Change cabin air filters
-Replace spark plugs
-Replace engine air filters
PDK Transmission
-Change fluid every 96,000 Miles or 12 Years
991.2 GT2 RS (2018-19)
12,000 Miles or 2 Years
-Change engine oil and filter
-Flush brake fluid
-Change water spray system filter & check fluid level
-Change cabin air filters
-Replace spark plugs
24,000 Miles or 4 Years
-Change engine oil and filter
-Flush brake fluid
-Change cabin air filters
-Replace spark plugs
-Replace engine air filters
PDK Transmission
-Change fluid every 96,000 Miles or 12 Years
Precision Porsche Service at HG Performance
Since 1969, HG Performance has been a Southern California Mercedes-Benz factory service center. In 2010, we began providing our same top-flight service to discerning BMW, Porsche, and other luxury vehicle drivers.
Our customers appreciate our experience in race car chassis set-up. The typical dealer or auto shop service doesn’t always meet the luxury car enthusiast’s or race driver’s standards. Get your Porsche to its peak performance potential when you trust service technicians who’ve worked on all Porsche makes and models. We’re happy to listen closely to your goals and preferences and involve you in customizing your car.
If you have questions, do not hesitate to reach out at 858.943.0891. We look forward to getting to know you and your unique Porsche!