The 2024 Porsche 911 Carrera 4 GTS with the 3.0L flat-six and 8-speed PDK gets an official EPA figure of 19 MPG combined. Nobody buys a Carrera 4 GTS expecting Prius-like efficiency. It’s engineered for exhilarating performance, and fuel economy is secondary to the driving experience. However, even performance car enthusiasts want to know how often they’ll be filling up.

City and highway performance

The EPA estimates the 911 Carrera 4 GTS achieves 17 MPG in the city and 23 MPG on the highway. Stop-and-go traffic reduces efficiency, and the city figure reflects frequent acceleration and deceleration. The highway MPG improves significantly, showing the benefits of cruising at a constant speed. The advanced 8-speed PDK transmission also helps, keeping the engine in its sweet spot when you’re on backroads.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Porsche 911 Carrera 4 GTS at $3,050. This is based on driving 15,000 miles per year and using the national average fuel price for premium gasoline. Fuel prices change, and individual driving habits will affect this number. Someone who drives aggressively or spends a lot of time in heavy traffic will likely exceed this estimate. If you’re concerned about fuel costs, you can review 911 MPG across all years to see how other models perform. However, if you’re buying a 911 GTS, you probably aren’t worried about gas prices.

Real-world expectations

The EPA provides a benchmark, but real-world fuel economy can vary. Aggressive driving, spirited acceleration, and extended idling will all decrease MPG. However, a smooth driving style and mostly highway miles can yield figures closer to, or even slightly above, the EPA estimates. Turbocharged engines are sensitive to throttle inputs. Press the accelerator firmly and watch the fuel gauge drop. Drive smoothly, anticipate traffic, and the fuel economy will improve noticeably.

How it compares

The Carrera 4 GTS competes with other high-performance sports cars. The BMW M4 Competition xDrive, for example, achieves a combined 18 MPG (16 city/23 highway). The Audi R8 V10 Performance Quattro offers a combined 16 MPG (13 city/21 highway). Even Porsche’s own 718 Cayman GTS 4.0, while smaller and lighter, achieves only 20 MPG combined (17 city/24 highway). Although the M4 gets slightly better MPG, that probably won’t sway a dedicated Porsche buyer. It highlights the trade-offs in this segment: performance versus efficiency. Comparing all Porsche fuel economy data will help you contextualize the 911 against Porsche’s other models.

Tips to maximize efficiency

Accelerate smoothly and predictably. Avoid quick bursts of speed and maintain a consistent pace. The more smoothly you drive, the less fuel you’ll burn.

Use the car’s driving modes. The “Normal” mode prioritizes fuel efficiency by adjusting throttle response and shift points. While it may not be ideal for spirited driving, it’s perfectly adequate for everyday commuting and can improve MPG.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which hurts fuel economy. Check your tire pressure and inflate them to the recommended levels shown on the driver’s side door jamb.

Reduce weight. Excess cargo in the trunk or back seats adds weight, making the engine work harder and consume more fuel. Removing unnecessary items can improve fuel economy slightly.