21 MPG combined is a cold, hard number that sits somewhat uncomfortably next to the intoxicating reality of the 2017 Porsche Panamera Turbo Executive. It’s a figure that will likely flicker across the minds of potential owners precisely once, perhaps during a moment of quiet reflection before signing the paperwork, before being banished by the promise of 550 horsepower and autobahn-storming performance. Let’s be honest: this isn’t a car purchased for its frugality. It’s a four-door executive express designed to shrink continents and pamper its occupants in equal measure, and the fuel economy simply reflects the cost of admission.

City and highway performance

The EPA estimates 18 MPG in the city and 25 MPG on the highway for the long-wheelbase Panamera Turbo Executive; these figures accurately portray the opposing forces at play. In urban environments, the 4.0L twin-turbo V8, with cylinder deactivation, will still consume fuel at a rate befitting its size and output. Stop-and-go traffic and the demands of spirited launches from every stoplight will undoubtedly drag that 18 MPG figure down further.

On the open road, however, the Panamera’s advanced eight-speed automatic transmission (AM-S8) and aerodynamic profile help it achieve a respectable 25 MPG. This assumes, of course, that you’re resisting the urge to exploit the engine’s prodigious power and maintain a reasonable cruising speed. If you’re constantly dipping into the immense reserves of torque for effortless passing maneuvers, expect the highway mileage to suffer.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Porsche Panamera Turbo Executive at $2,750. This figure is based on driving 15,000 miles per year, with 45% of those miles driven in the city and 55% on the highway. The calculation also uses the national average fuel price, which fluctuates constantly but gives a reasonable baseline for comparison.

For those who drive significantly more or less than 15,000 miles annually, or reside in states with higher fuel prices, the actual cost will vary accordingly. However, the $2,750 figure provides a clear benchmark for understanding the financial commitment associated with fueling this high-performance luxury sedan.

Real-world expectations

Realistic expectations are critical for prospective buyers. While the EPA ratings offer a standardized comparison, individual driving habits will have a significant impact on fuel consumption. A lead-footed driver who frequently explores the upper reaches of the rev range can easily see combined mileage drop into the mid-teens. Conversely, a more conservative driver who prioritizes smooth acceleration and consistent highway speeds might be able to match or even slightly exceed the EPA’s estimates.

Keep in mind that the Panamera Turbo Executive is a heavy car with a powerful engine, and those factors will always influence fuel economy. Regular maintenance, including properly inflated tires and timely oil changes, can also play a role in maximizing efficiency.

How it compares

Compared to other vehicles in its class, the 2017 Panamera Turbo Executive’s fuel economy lands somewhere in the middle of the pack. The Mercedes-AMG S63 sedan, with its similar displacement and power output, offers comparable MPG figures, hovering around 17 MPG city and 26 MPG highway. The BMW M760i xDrive, powered by a V12 engine, tends to fare worse, struggling to break 20 MPG on the highway.

The Audi S8 Plus, while slightly more efficient at approximately 18 MPG city and 27 MPG highway, sacrifices some of the Panamera’s dynamic handling and driver engagement. The choice often comes down to prioritizing performance characteristics and brand preference, as the MPG differences are typically marginal for this buyer. For those truly concerned about fuel efficiency, a hybrid option like the PANAMERA MPG across all years might be a more palatable choice. However, that comes with a compromise in raw power and acceleration.

Tips to maximize efficiency

Engage “Normal” or “Eco” mode whenever possible. The Panamera’s various driving modes drastically alter the car’s behavior, optimizing engine and transmission settings for either maximum performance or improved fuel economy. While it’s tempting to leave the car in “Sport” or “Sport Plus” mode for optimal throttle response, selecting a more conservative setting during routine driving can measurably reduce fuel consumption.

Pay attention to tire pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and burning more fuel. Regularly check your tire pressure and inflate them to the manufacturer’s recommended levels, typically found on a sticker inside the driver’s side door frame. This simple step can make a noticeable difference in fuel economy.

Anticipate traffic and drive smoothly. Aggressive acceleration and hard braking consume a disproportionate amount of fuel. By anticipating traffic flow and maintaining a consistent speed, you can minimize the need for sudden bursts of power and reduce overall fuel consumption. The Panamera’s adaptive cruise control system can be helpful in maintaining a smooth and consistent speed on the highway.

Avoid unnecessary weight. Carrying excessive cargo in the trunk or backseat adds weight to the vehicle, which negatively impacts fuel economy. Remove any unnecessary items to lighten the load and improve efficiency. Even a few hundred pounds of extra weight can make a difference over time.

Use the coasting function. The Panamera’s advanced transmission allows it to coast under certain conditions, disengaging the engine from the drivetrain and allowing the car to roll freely. This reduces engine braking and can improve fuel economy, especially on long downhill stretches. Get all Porsche fuel economy data and see for yourself how efficiency technologies vary across models at Porsche fuel economy.