The 2018 Porsche Panamera 4S Executive, equipped with its twin-turbocharged 2.9L V6, achieves a combined fuel economy of 23 MPG. While hardly Prius territory, this figure is a reasonable compromise for a stretched, luxurious, all-wheel-drive performance sedan capable of blistering acceleration and cornering. Its buyers aren’t prioritizing ultimate fuel efficiency; they desire prestige, power, and the cachet that comes with the Porsche crest, but they appreciate that this level of performance doesn’t necessitate single-digit MPG figures.

City and highway performance

The EPA estimates the 2018 Panamera 4S Executive will achieve 21 MPG in the city and 28 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the engine spends more time idling and accelerating, negating the fuel-saving benefits of the 8-speed automatic transmission. The highway figure, on the other hand, showcases the engine’s efficiency at steady speeds. The 2.9L V6, despite its forced induction, is engineered to operate efficiently when cruising, allowing for respectable mileage on long trips. The AWD system adds weight and complexity, impacting fuel consumption in both environments, but provides a level of security and performance that buyers in northern climates likely deem essential. The long wheelbase ‘Executive’ trim also adds weight, slightly impacting performance and economy.

Annual fuel cost

The EPA estimates that owners of the 2018 Porsche Panamera 4S Executive will spend $2,500 per year on fuel. This calculation is based on driving 15,000 miles annually, with 55% of those miles driven in the city and 45% on the highway. The estimate also uses the national average fuel price for premium gasoline, which the Panamera requires to deliver its stated performance and maintain its long-term health. This $2,500 figure is a standardized benchmark, allowing prospective buyers to compare the Panamera’s fuel costs against other vehicles, acknowledging that individual driving habits and local fuel prices will ultimately influence the actual amount spent. Checking all Porsche fuel economy data shows how the Panamera fits into the brand’s lineup.

Real-world expectations

While the EPA provides a standardized test cycle, real-world fuel economy can vary significantly depending on driving style, traffic conditions, and environmental factors. Aggressive acceleration and frequent hard braking will undoubtedly reduce fuel economy below the EPA estimates. Similarly, consistent idling in heavy traffic, particularly during colder months, can negatively impact mileage. Owners who primarily drive in congested urban areas should expect fuel economy closer to the 21 MPG city rating, or even slightly below it.

Conversely, those who frequently undertake long highway journeys, employing cruise control and maintaining steady speeds, may see figures closer to, or even slightly exceeding, the 28 MPG highway rating. Those interested in comparing PANAMERA MPG across all years can see how this model year stacks up.

How it compares

The Audi S7, another performance-oriented luxury sedan with a similar mission, achieves an EPA-estimated 22 MPG combined with its 4.0L V8, making it slightly less efficient than the Panamera 4S. The Mercedes-AMG CLS53, with its inline-6 and hybrid assist, manages a comparable 24 MPG combined. The BMW M550i xDrive, boasting a potent V8, posts a combined 20 MPG. These comparisons reveal that the Panamera 4S Executive occupies a competitive position within its segment. While not the most fuel-efficient, it strikes a balance between performance and economy that appeals to buyers who demand both luxury and driving excitement. Buyers cross-shopping these models prioritize a blend of power, prestige, and technology, with fuel economy falling further down the list of priorities than it would for a mainstream sedan buyer.

Tips to maximize efficiency

Given the Panamera 4S Executive’s twin-turbocharged engine, avoid aggressive acceleration and “jackrabbit” starts. Gradual acceleration allows the turbos to spool up more efficiently, reducing fuel consumption and minimizing unnecessary strain on the drivetrain. Anticipate traffic flow and maintain a consistent speed whenever possible.

Proper tire inflation is crucial for optimizing fuel economy. Check your tires regularly and ensure they are inflated to the pressure recommended on the door jamb sticker. Under-inflated tires increase rolling resistance, leading to reduced fuel efficiency and premature tire wear.

Minimize excessive idling, particularly in cold weather. Modern engines warm up relatively quickly while driving, making prolonged idling unnecessary. If you anticipate stopping for an extended period, turn off the engine to conserve fuel and reduce emissions.

Regular maintenance, including oil changes and air filter replacements, is essential for maintaining optimal engine performance and fuel economy. A clean air filter ensures proper airflow into the engine, while fresh oil reduces friction and improves lubrication, both contributing to improved efficiency.

Consider using the “Normal” or “Eco” driving modes when performance is not important. These modes typically adjust throttle response and transmission shift points to prioritize fuel efficiency over outright acceleration, helping to extract the most mileage from each gallon of premium fuel.