18 MPG combined. The EPA gives that figure to the 2023 Porsche Cayenne S with the 2.9L twin-turbo V6. It’s a number that’s unlikely to scare away the typical Cayenne S buyer, who prioritizes performance and driving experience far more than saving gas. After all, this isn’t a commuter car; it’s a performance SUV with some practicality, and most owners understand the trade-off.

City and highway performance

The Cayenne S earns an EPA-estimated 16 MPG in the city. This reflects the reality of stop-and-go driving where the engine works harder and doesn’t benefit from consistent speeds. On the highway, that figure climbs to 22 MPG. That’s a noticeable improvement, achievable when the Cayenne S settles into a more relaxed pace. This difference between city and highway mileage suggests that drivers who spend more time on open roads will see closer to, or perhaps even slightly better than, the combined rating. The automatic start/stop system, while occasionally intrusive, helps save fuel in urban environments.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2023 Porsche Cayenne S is $3,200. This figure is calculated based on driving 15,000 miles per year and using national average fuel prices. The actual cost will vary depending on your driving habits, the type of fuel you use (premium is recommended), and prevailing gas prices in your area. It’s a significant factor for those considering the Cayenne S, but generally not a purchase barrier for its target demographic; these customers are willing to pay a premium for performance and the Porsche badge.

Real-world expectations

While EPA estimates provide a useful baseline, real-world fuel economy often differs. Aggressive driving, frequent short trips, and sustained high-speed cruising will all lower your MPG. A careful driver who anticipates traffic and uses the Cayenne’s driving modes might get close to or slightly exceed the EPA estimates. The Cayenne S is a heavy vehicle with a powerful engine, so expecting hybrid-like efficiency is unrealistic. If lowering fuel costs is a top priority, exploring the Cayenne E-Hybrid might be a more suitable option. See CAYENNE MPG across all years to get a better sense of how the model has performed over time.

How it compares

The Cayenne S is in a competitive segment with several alternatives, each offering a different mix of performance and economy. The BMW X5 M50i, with its 4.4-liter V8, delivers similar performance to the Cayenne S but typically achieves around 17 MPG combined. The Mercedes-Benz GLE 450, equipped with a 3.0-liter inline-six, fares slightly better at around 21 MPG combined. An Audi SQ7, with its potent V8, also lands in the same ballpark, around 18 MPG combined. These comparisons show that the Cayenne S’s fuel economy is generally like its direct competitors, but anyone looking for more fuel-efficient performance might consider the hybrid versions offered by many of these brands.

Tips to maximize efficiency

The Cayenne S, despite its performance focus, can achieve better fuel economy with conscious driving habits. Avoid aggressive acceleration and hard braking, as these actions quickly use fuel. Try to maintain a steady speed on the highway and anticipate traffic flow to minimize speed changes.

Select the driving mode using the steering wheel-mounted dial. Normal mode optimizes for fuel efficiency during everyday driving. Sport and Sport Plus modes prioritize performance and will reduce MPG. Consider using Individual mode to fine-tune settings to your liking, perhaps prioritizing fuel efficiency.

Ensure your tires are inflated correctly. Underinflated tires increase rolling resistance, which lowers fuel economy. Check your tire pressure regularly and maintain the recommended levels specified on the door jamb sticker.

Reduce unnecessary weight in the vehicle. Carrying heavy cargo increases the engine’s workload and lowers fuel efficiency. Remove any items from the trunk that aren’t essential, such as golf clubs or unused equipment.

Keep your vehicle maintained. Regular oil changes, air filter replacements, and other maintenance tasks ensure the engine runs efficiently. Neglecting maintenance can reduce performance and decrease fuel economy. Explore all Porsche fuel economy data for further insights.