18 MPG combined. That’s the fuel economy for the 2022 Porsche Cayenne S with its 2.9L twin-turbo V6. While that number might elicit a wince from some, it’s acceptable to the buyer who prioritizes driving dynamics and brand prestige over outright fuel efficiency. This isn’t a vehicle for hypermilers; it’s an indulgence, a statement, and a performance-oriented SUV that just happens to ferry kids to soccer practice.

City and highway performance

The EPA estimates the 2022 Cayenne S at 16 MPG in the city and 22 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the Cayenne S’s weight and powerful engine demand more fuel to accelerate and decelerate. On the open road, at a consistent cruising speed, the highway rating is more palatable, reflecting the engine’s ability to operate more efficiently when not under heavy load. Drivers with a heavier foot will likely see numbers below these estimates, while those who adopt a more relaxed driving style may approach or even slightly exceed them.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2022 Porsche Cayenne S at $3,200. This figure is based on driving 15,000 miles per year, using a blend of city and highway driving conditions that mirror the EPA’s testing cycle. The calculation also uses the national average fuel price for premium gasoline, which is the recommended fuel for the Cayenne S. Keep in mind that this is an estimate, and your actual fuel costs could vary depending on your driving habits, the type of roads you typically drive on, and local fuel prices.

Real-world expectations

While the EPA provides a standardized testing method, real-world fuel economy can differ significantly. Drivers who frequently engage the Cayenne S’s Sport or Sport Plus driving modes, or who regularly use its considerable acceleration, will likely experience fuel economy below the EPA estimates. On the other hand, those who primarily drive on the highway and adopt a gentle driving style may see slightly better results. The Cayenne S’s all-wheel-drive system also contributes to fuel consumption, as it constantly distributes power to all four wheels, increasing drivetrain friction.

How it compares

Compared to its competitors, the Cayenne S occupies a middle ground in terms of fuel economy. The BMW X5 xDrive40i, with its inline-six engine, manages an EPA-estimated 21 MPG combined, a slight edge over the Cayenne S. The Mercedes-Benz GLE 450 4MATIC, another inline-six competitor, offers a similar 20 MPG combined. At the lower end, you could find the (now discontinued) supercharged V8 Range Rover Sport, which delivered a dismal 17 MPG combined, highlighting the improvements Porsche has made in powertrain efficiency. The Cayenne Turbo models, of course, drink even more fuel than the S. These numbers are significant because while Cayenne buyers prioritize performance and luxury, they’re often still mindful of running costs, particularly considering the Cayenne’s higher price point and premium fuel requirement, as revealed in CAYENNE MPG across all years. If fuel economy is a primary concern within the Porsche family, shoppers might consider exploring all Porsche fuel economy data.

Tips to maximize efficiency

The Cayenne S is equipped with an automatic start/stop system that shuts off the engine at traffic lights and other brief stops. Make sure this feature is enabled for the best possible city fuel economy. While it might seem counterintuitive in a performance SUV, avoiding aggressive acceleration and maintaining a steady speed can significantly improve your fuel consumption, especially on the highway. Every hard acceleration burns excess fuel.

Regular maintenance, including properly inflated tires and a clean air filter, contributes to optimal engine performance and fuel economy. Tire pressure can impact rolling resistance, while a clogged air filter restricts airflow to the engine. Consider removing any unnecessary weight from the vehicle, as carrying extra cargo increases fuel consumption. Removing items from the trunk can have a subtle but positive impact.

Use the Cayenne S’s various driving modes strategically. The “Normal” mode is generally the most fuel-efficient for everyday driving, while “Sport” and “Sport Plus” prioritize performance and reduce fuel economy. Resist the urge to constantly engage the sportier modes unless you need the extra performance. Consider enrolling in a performance driving school. This might sound counterintuitive for saving fuel, but it’s about smoothness, not just speed.

Plan your routes to avoid stop-and-go traffic whenever possible. Constant braking and acceleration consume more fuel. Using navigation apps to find routes with less congestion can improve your overall fuel economy. Even with a powerful engine and luxurious appointments, smart driving habits still matter. Don’t let the twin-turbo V6 trick you into thinking efficiency is optional.