18 MPG combined. Let’s address the elephant in the room: nobody considering a 2015 Porsche Panamera Turbo S Executive is prioritizing fuel economy. They’re buying a rolling statement piece, a titan of twin-turbocharged excess that happens to offer a truly usable rear seat and the Autobahn-bred stability of a genuine sports sedan. To the driver of a Panamera Turbo S Executive, fuel cost is simply the price of admission to the world of opulent performance.

City and highway performance

The EPA estimates the Panamera Turbo S Executive at 15 MPG in the city and 24 MPG on the highway. These figures are a reflection of the immense power available and the relatively hefty curb weight of this extended-wheelbase model. The 4.8L twin-turbo V8, producing a staggering 570 horsepower, demands its share of premium fuel, especially during demanding city driving. On the open road, the seven-speed PDK transmission and exceptionally long seventh gear help to use the engine’s torque, delivering respectable highway mileage for its class. Expect that highway figure to decrease at the sustained high speeds this car so readily achieves.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Porsche Panamera Turbo S Executive at $3,200. 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 assumes the use of premium gasoline (required for optimal performance) at the national average fuel price. Fuel prices fluctuate, and your actual fuel costs may vary depending on your driving habits and location. Still, $3,200 is a significant figure, but unlikely to deter the target demographic.

Real-world expectations

Real-world MPG figures for the Panamera Turbo S Executive are predictably varied. Aggressive driving will easily push the combined MPG into the low teens or even single digits. Modulated throttle inputs on the highway might yield figures slightly above the EPA estimate. This car encourages spirited driving. Its capabilities are beyond those of typical luxury sedans, and resisting the urge to exploit its vast potential is a challenge. Expect a combined MPG figure somewhere between 14 and 20 MPG in everyday driving.

How it compares

Compared to other high-performance luxury sedans, the Panamera Turbo S Executive’s fuel economy is middling. A similarly equipped Mercedes-AMG S63 Sedan achieves a combined 19 MPG, slightly better than the Porsche. The BMW Alpina B7 xDrive, another performance-oriented competitor, manages a nearly identical 18 MPG combined. Even all all Porsche fuel economy data indicates this is closer to the bottom of the range. The Audi S8 earns a respectable 20 MPG combined. The difference can add up over time, but these buyers are often willing to sacrifice a few MPG for the Panamera’s unique blend of performance, luxury, and distinctive styling. Remember to compare PANAMERA MPG across all years, as there may be some improvements in later models.

Tips to maximize efficiency

While fuel economy might not be a primary concern for the Panamera Turbo S Executive owner, there are ways to improve it. Avoid aggressive acceleration and braking. The twin-turbo V8 is responsive, which makes it easy to launch quickly, but being gentle with the throttle can improve fuel efficiency.

Use the car’s driving modes intelligently. Select the “Normal” or “Eco” mode for relaxed cruising and city driving. These modes may dampen throttle response, but they will optimize the engine for fuel efficiency. Reserve “Sport” and “Sport Plus” for track days or when you need to unleash the car’s full potential.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressures regularly and inflate them to the recommended levels, which can be found on the driver’s side doorjamb or in the owner’s manual.

Minimize idling. Modern engines are efficient when running, even at low speeds. Avoid excessive idling, especially when dropping off or picking people up. If you anticipate being stopped for more than a minute or two, turn off the engine.