21 MPG combined won’t win any hypermiling contests. The 2015 Porsche 911 Carrera 4 GTS 3.8L isn’t built for chasing fuel efficiency records. This is a performance machine designed for dissecting apexes and thrilling its driver. The modest fuel economy is simply a price of admission acknowledged but rarely dwelled upon by the enthusiast who craves the exhilarating response of its naturally aspirated flat-six engine and the surefootedness of its all-wheel-drive system.

City and highway performance

The EPA estimates for the 2015 911 Carrera 4 GTS are 19 MPG in the city and 25 MPG on the highway. These numbers reflect stop-and-go traffic and sustained high-speed cruising. The city figure acknowledges the engine’s thirst when frequently accelerating from a standstill, even with the automatic (AM-S7) transmission working to optimize gear selection. The highway MPG, while better, still reflects the aerodynamic drag and rolling resistance inherent in any performance vehicle capable of exceeding 180 mph. This isn’t a prius. its 3.8L flat-six begs to be uncorked.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Porsche 911 Carrera 4 GTS at $2,750. This is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. It’s a useful benchmark, though individual fuel costs will vary depending on driving habits, local fuel prices, and the grade of fuel used. Porsche recommends premium fuel for optimal performance, so owners should factor that into their budgeting.

Real-world expectations

Few 911 Carrera 4 GTS owners adhere to the EPA’s testing methodology. This car encourages spirited driving, and it’s unlikely anyone acquiring one is primarily concerned with maximizing fuel savings. Expect the combined MPG to fluctuate based on driving style. Aggressive acceleration and frequent track days will inevitably decrease fuel economy, while more restrained driving on longer highway journeys might yield numbers closer to or even slightly exceeding the EPA’s 25 MPG estimate. Chasing optimal fuel economy in a 911 feels like missing the point. This is a car to be enjoyed. frugality is a secondary consideration.

How it compares

Compared to direct competitors, the 2015 911 Carrera 4 GTS occupies a specific niche. The Audi R8 V8 from the same year offered a similar aural experience, though hovered around 16 MPG combined with its V8 engine, making the Porsche a slightly more economical choice. A BMW M4, with its turbocharged inline-six, achieved closer to 20 MPG combined, trading some aural excitement for improved efficiency. Buyers in this segment understand the compromise between performance and fuel economy and often prioritize driver engagement over pure mpg figures, but want to explore all all Porsche fuel economy data.

Tips to maximize efficiency

While maximizing fuel efficiency might not be the primary goal, some strategies can help eke out a few extra miles per gallon. Avoid aggressive acceleration and hard braking, as these actions drain fuel quickly. The 911’s responsive throttle can be deceptively sensitive; smooth, deliberate inputs will improve efficiency without sacrificing too much enjoyment.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consuming more fuel. Check tire pressures regularly and inflate them to the manufacturer’s recommended levels, found on the doorjamb sticker.

Minimize idling. Modern engines consume fuel even when stationary. Avoid unnecessary idling, especially in traffic or while waiting. Turning off the engine during prolonged stops will reduce fuel consumption, although the impact may be minimal in shorter durations.

Consider using the automatic transmission’s “eco” mode, if equipped. This mode optimizes shift points for fuel efficiency, sacrificing some performance. It might not be the ideal setting for spirited driving, but it can provide a small improvement in fuel economy during normal commuting.

Keep up with scheduled maintenance. A properly maintained engine runs more efficiently. Ensure regular oil changes, air filter replacements, and spark plug inspections to optimize performance and fuel economy. And for a deeper dive, explore 911 MPG across all years.