17 MPG combined. Let’s be honest: anyone cross-shopping a 2021 Porsche Panamera GTS Sport Turismo because of fuel economy is fundamentally missing the point. This isn’t a Prius. This is a fire-breathing, V8-powered luxury performance wagon designed to devour autobahn miles while coddling its occupants in leather and Alcantara. Fuel efficiency is an afterthought, a necessary evil tolerated by those who prioritize visceral thrills and performance over saving a few dollars at the pump. Buyers in this segment prioritize driving experience, exclusivity, and outright speed above all else. They accept the thirst of the 4.0-liter twin-turbocharged V8 as the price of admission to a very exclusive club.

City and highway performance

The Panamera GTS ST’s official EPA ratings break down to 15 MPG in the city and 20 MPG on the highway. The city figure reflects the engine’s inefficiency during stop-and-go driving. The powerful V8 requires a substantial amount of fuel to get its nearly 4,700 pounds moving from a standstill, especially when exploiting its rapid acceleration away from lights. The highway number is predictably better, but only marginally so. This is thanks to the relatively short gearing in the 8-speed PDK transmission, necessary to keep the engine in its powerband for rapid overtaking maneuvers. While the cylinder deactivation technology can shut down four cylinders under light load, the aggressive driving style inherent in the Panamera GTS ownership experience means this feature is rarely engaged for extended periods.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,400 for the 2021 Porsche Panamera GTS Sport Turismo. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. Given the reality that most Panamera GTS owners likely indulge in more spirited driving than the EPA anticipates, and premium fuel prices tend to fluctuate, this number should be considered a baseline figure. Expect to potentially spend more, especially with frequent track days or extended high-speed runs.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy for the Panamera GTS Sport Turismo will vary substantially depending on driving style and conditions. Conservative drivers who prioritize efficiency could potentially see figures closer to the EPA estimates, especially on long highway journeys. However, the temptation to exploit the engine’s 473 horsepower and 457 lb-ft of torque is ever-present. Expect a more realistic combined MPG closer to 14-16 MPG with typical mixed driving. Heavy-footed drivers who frequently engage Sport or Sport Plus modes, or regularly use launch control, should prepare for even lower numbers. The Panamera GTS ST rewards enthusiastic driving, but it extracts a penalty at the pump.

How it compares

In the realm of high-performance luxury wagons, the Panamera GTS ST doesn’t have many direct competitors. The Mercedes-AMG E63 S Wagon, with its monstrous 603-hp V8, achieves a similar 16 MPG combined. The Audi RS6 Avant, packing 591 hp, lands at 18 MPG combined. Buyers considering any of these vehicles are not likely to be swayed by a mere 1-2 MPG difference. All deliver staggering performance and luxurious appointments. The true differentiator lies more in brand preference, driving dynamics, and styling than outright fuel efficiency. For those seeking slightly better economy without sacrificing performance, the Panamera 4S E-Hybrid Sport Turismo offers a plug-in hybrid powertrain, achieving a significantly improved MPGe rating and lower running costs, but it comes at a premium and with a different driving experience. If you’re interested in PANAMERA MPG across all years, consider the Panamera 4 E-Hybrid for ultimate fuel economy in the range, or check all Porsche fuel economy data for a wider selection.

Tips to maximize efficiency

Resist the urge to constantly bury your right foot in the throttle. The Panamera GTS ST is incredibly responsive, and the intoxicating sound of the V8 can be addictive, but modulating your throttle inputs will yield noticeable fuel savings.

Use the adaptive cruise control and lane-keeping assist features on long highway drives. These systems can help maintain a consistent speed and lane position, reducing unnecessary acceleration and braking, which consume extra fuel.

Select the “Normal” driving mode when cruising or commuting. While Sport and Sport Plus modes sharpen throttle response and hold gears longer, they also significantly increase fuel consumption. ‘Normal’ provides adequate performance for everyday driving while prioritizing efficiency.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and consuming more fuel. Check tire pressures regularly, especially before long journeys.

Minimize unnecessary weight in the vehicle. Removing excess cargo from the trunk and rear seats can reduce the load on the engine and improve fuel economy, albeit marginally. Every little bit counts when trying to squeeze more miles out of a tank.