18 MPG combined is the EPA rating for the 2025 Porsche Panamera GTS. This figure is not an afterthought for the buyer of this specific, capable luxury sport sedan. This is not a vehicle purchased solely for its efficiency. The Panamera GTS wears its fuel consumption like a badge of honor, a consequence of its visceral performance and the inherent thirst of a naturally aspirated (for previous generations), now twin-turbocharged 4.0L V8. The buyer understands this, embracing the compromise as part of the GTS’s package. They prioritize the driving experience: the immediate throttle response, the thunderous exhaust note, and the telepathic handling that defines a Porsche GTS. Fuel economy, while acknowledged, takes a backseat to the joy behind the wheel.

City and highway performance

The urban grind yields a 16 MPG city rating for the Panamera GTS. This number, typical for a powerful twin-turbo V8 in stop-and-go traffic, reflects the substantial energy required to move a 4,500+ pound luxury sedan from standstill, repeatedly. The 8-speed Porsche Doppelkupplung (PDK) transmission, designed for efficiency and lightning-fast shifts, can only do so much against the physics of urban driving and the driver’s likely heavy right foot. On the open road, the picture improves with a 24 MPG highway rating. This is where the GTS truly stretches its legs, the V8 settling into a lower RPM cruise, making the most of the long gears and advanced aerodynamics. The efficient mapping of the PDK ensures that at cruising speeds, the engine operates in its most economical range, turning what can be a gas guzzler into a surprisingly composed long-distance tourer.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,200 for the 2025 Panamera GTS. This figure is based on driving 15,000 miles per year, with an assumed mix of city and highway driving, and using national average fuel prices, which for a vehicle like the GTS, will always factor in premium unleaded. For the typical Panamera GTS owner, an individual with substantial disposable income, this $3,200 annual fuel outlay is a minor consideration in the total cost of ownership. The purchase price, insurance, routine maintenance, and potential performance upgrades significantly overshadow this recurring expense. It’s a cost absorbed without complaint, expected as part of the experience of owning a high-performance luxury vehicle.

Real-world expectations

Real-world fuel economy for the Panamera GTS will vary significantly based on driving style. For the enthusiast who frequently explores the upper reaches of the tachometer, city MPG could easily dip into the low teens, while highway figures might struggle to maintain the EPA’s 24 MPG. Conversely, a driver with a lighter touch, employing careful throttle modulation and anticipating traffic, could potentially exceed the EPA ratings, particularly during long, uninterrupted highway journeys. The intoxicating exhaust note and the instant torque delivery of the 4.0L twin-turbo V8 are powerful incentives to push the car, and few GTS owners will exercise the kind of restraint necessary for optimal efficiency. The vehicle’s character actively encourages spirited driving, which directly impacts its consumption.

How it compares

The Panamera GTS carves a niche between dedicated sports cars and larger luxury sedans. Its 18 MPG combined rating positions it squarely within its competitive set. Consider the Mercedes-AMG GT 4-door Coupe 63, which often sees 17 MPG combined, or the BMW M8 Gran Coupe, rated around 17 MPG combined. The Aston Martin DBX707, a performance SUV with similar engine displacement, hovers around 15 MPG combined. Even the more performance-oriented trims of the Audi RS7, with its 4.0L twin-turbo V8, typically land in the 17-18 MPG combined range. Buyers weighing these options are not primarily focused on fuel efficiency alone; they scrutinize performance metrics, interior luxury, and brand cachet. The GTS’s fuel economy is entirely congruent with its mission and its peers. For buyers seeking a more efficient Panamera, options like the Panamera E-Hybrid models offer significantly better fuel economy, often exceeding 50 MPGe combined, but at the cost of the raw, unadulterated V8 experience that defines the GTS. You can view PANAMERA MPG across all years for a better comparison.

Tips to maximize efficiency

While maximum efficiency isn’t the primary goal for GTS owners, conscious driving habits can certainly improve its 18 MPG combined rating. Anticipating traffic and employing smooth acceleration and deceleration will significantly reduce the engine’s workload, especially in city driving.

Making judicious use of the automatic start/stop system, assuming it’s engaged, can shave off some fuel consumption during prolonged idling periods, common during urban commutes. While the temptation to disable it for immediate response is strong, keeping it active when appropriate can make a small difference.

Maintaining proper tire inflation to the manufacturer’s recommended pressures is a simple yet effective way to reduce rolling resistance and ensure the 4.0L V8 isn’t working harder than it needs to. Regularly checking tire pressures is beneficial for both efficiency and handling.

Opting for the “Normal” driving mode over “Sport” or “Sport Plus” will adjust throttle mapping, transmission shift points, and suspension settings for a more relaxed, and by extension, more efficient driving experience, particularly during everyday commutes or long highway stretches.

Regular maintenance, adhering to Porsche’s recommended service schedule, ensures that the engine and transmission are operating at their peak efficiency. Clean air filters and fresh engine oil prevent unnecessary drag and ensure optimal combustion, helping to maintain its fuel economy over the long term. For more insights into Porsche’s approach to performance and efficiency, explore all Porsche fuel economy data.