23 MPG combined is respectable, but it’s not the main reason for buying the 2015 Porsche 911 Carrera. This car is designed for performance, and fuel economy lets owners enjoy that performance without excessive guilt. The 3.4L flat-six provides a spine-tingling soundtrack and immediate throttle response instead of focusing on sipping fuel. Buyers of this car prioritize driving engagement and are willing to pay for gas.

City and highway performance

The 2015 Porsche 911 Carrera, with the 3.4L engine and the AM-S7 automatic transmission, gets an EPA-estimated 20 MPG in the city. Stop-and-go traffic reduces efficiency because the engine works constantly. On the open road, however, the 911 does better, getting a respectable 28 MPG on the highway. The engine cruises efficiently at steady speeds, using aerodynamics and an efficient transmission to minimize fuel consumption when not accelerating. Even on the highway, speeding will lower the MPG.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Porsche 911 Carrera at $2,500. This is based on driving 15,000 miles per year, with a mix of city and highway driving, using national average fuel prices. Your actual fuel costs depend on your driving, the fuel you use (premium is recommended), and local fuel prices. Hard acceleration, consistent high-speed driving, and short trips will increase your fuel expenses. Careful driving and longer trips at steady speeds should reduce them.

Real-world expectations

EPA estimates provide a baseline, but real-world fuel economy can change. Many 911 owners achieve figures close to the EPA estimates during normal commuting. The estimates can easily drop if drivers drive the car hard, which is common. Spirited acceleration, track days, and weekend drives on winding roads consume more fuel. Performance driving greatly affects city MPG, with numbers potentially dropping to 16-17 MPG, depending on your style.

How it compares

The 2015 Porsche 911 Carrera’s fuel economy is competitive for its class. A comparable BMW M4 from the same year achieves a similar EPA combined rating of 20 MPG, but offers a slightly higher 26 MPG on the highway, something to consider for long trips. The Mercedes-AMG C63 S Coupe delivers around 18 MPG combined. These vehicles are cross-shopped, and fuel consumption is often less important than performance. For those prioritizing fuel efficiency, a Tesla Model S might be considered, achieving an MPGe of over 100, but it delivers a completely different driving experience. You’ll find 911 MPG across all years at FuelEconomyHub.com. You can view all Porsche fuel economy data on this website as well.

Tips to maximize efficiency

Maintain proper tire inflation. The 911’s performance relies on the right tire pressure. Underinflated tires reduce handling and increase rolling resistance, leading to higher fuel consumption. Check the sticker on the driver’s side doorjamb for the recommended pressure, and check your tires often.

Anticipate traffic flow and avoid aggressive acceleration. The 911’s engine is responsive, but frequent bursts of acceleration will quickly drain the fuel tank. Use smooth throttle inputs and anticipate traffic to improve fuel economy.

Minimize idling. Letting the engine idle wastes fuel. If you’re stopped for more than a minute, turn off the engine. Modern engines restart quickly, and the fuel saved will add up.

Use the appropriate driving mode. The 911’s automatic transmission offers driving modes, such as “Normal,” “Sport,” and “Sport Plus.” Use “Normal” for everyday driving to prioritize fuel efficiency by upshifting sooner and using a relaxed throttle response.