17 MPG combined is the price of admission to the Porsche 911 GT3 experience. It’s a figure that will make many drivers cringe, but GT3 owners aren’t buying economy; they’re buying a pure connection to a legendary racing lineage. This is a machine designed to attack apexes and obliterate lap times, and fuel efficiency takes a distant back seat to performance.

City and highway performance

The EPA estimates the 2016 Porsche 911 GT3 at 15 MPG in the city and 20 MPG on the highway. These numbers, while seemingly low, reflect the GT3’s high-revving nature and its focus on immediate throttle response. Around town, the 3.8L flat-six engine coupled with the rapid-shifting AM-S7 dual-clutch transmission begs to be unleashed, making disciplined, fuel-conscious driving a near impossibility, or at least deeply unsatisfying. On the open road, reaching 20 MPG requires restraint and a dedication to resisting the urge to explore the upper limits of the engine’s power band. Good luck with that.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2016 Porsche 911 GT3 is $3,400. This estimation is based on driving 15,000 miles per year and using national average fuel prices. Given the GT3’s thirst for premium gasoline and the probability that most owners will indulge in aggressive driving, exceeding this figure is almost guaranteed. The reality for many GT3 owners is that fuel costs are simply part of the ownership experience, a necessary expense to fully enjoy the car’s capabilities.

Real-world expectations

Don’t expect to consistently achieve the EPA’s numbers in daily driving. The GT3’s fuel economy suffers significantly under spirited driving conditions, which is exactly how most owners will drive it. Track days and canyon runs will dramatically reduce fuel efficiency, potentially dropping well below the EPA estimates. Owners should budget accordingly and understand that the GT3 is not designed for economy runs; it’s engineered for exhilarating performance. If fuel bills are a major concern, perhaps considering browsing 911 MPG across all years isn’t a bad idea, maybe targeting a different trim.

How it compares

Compared to other high-performance sports cars, the GT3’s fuel economy is par for the course. A contemporary Mercedes-AMG GT S, with its twin-turbo V8, manages around 16 MPG combined. A Chevrolet Corvette Z06, known for its raw power, achieves similar figures. Even cars like the BMW M4, which are less focused than the GT3, struggle to break the 20 MPG barrier in real-world driving. The slightly more modern Porsche 911 GT3 RS can exhibit very similar overall mileage numbers. Performance comes at a price, and fuel consumption is often a secondary consideration for buyers in this segment, who are likely to compare against all Porsche fuel economy data.

Tips to maximize efficiency

While the GT3 isn’t built for fuel efficiency, a few techniques can help you squeeze a bit more range out of each tank. Resist the temptation to bury the throttle at every opportunity. The engine loves to rev, but keeping the RPMs in the lower range (when possible) can significantly improve fuel consumption.

Use the automatic transmission’s higher gears whenever appropriate. The AM-S7 dual-clutch transmission shifts quickly and efficiently; allow it to do its job without constant manual intervention. Letting the car shift at lower RPM can save fuel.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly and maintain the recommended levels.

Avoid unnecessary idling. Letting the engine idle for extended periods consumes fuel without covering any distance. If you’re stopped for more than a minute, turn off the engine, (unless the track is hot, then you need cool-down time for the engine!) This is not likely to be a concern in a car mostly used for recreation.

Consider the weight you’re carrying. Removing unnecessary items from the car can slightly improve fuel economy. The GT3 is already a lightweight machine, but every pound counts, especially when accelerating.