The 2019 Porsche Cayenne S, with its 2.9L 6-cylinder engine, gets 20 MPG combined. While this isn’t impressive or even average for an SUV, focusing only on this number misses the point of buying this vehicle. Cayenne S buyers prioritize performance, driving dynamics, and the Porsche brand. Fuel economy is a compromise, the price to pay for a high-performance SUV, and a trade-off they often accept.

City and highway performance

The EPA estimates 18 MPG in the city and 23 MPG on the highway, showing that the Cayenne S consumes more fuel in stop-and-go traffic. The city rating reflects the engine working harder during acceleration and deceleration. While the highway number is better, it’s still not great. The 2.9L twin-turbo V6 is responsive and powerful but designed for immediate throttle response and mid-range torque, not efficiency. The eight-speed automatic transmission is smooth and responsive, but prioritizes fast shifts and power delivery, so it only minimally improves fuel economy.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Porsche Cayenne S at $2,900. This is based on 15,000 miles per year, a mix of city and highway driving, and the national average fuel price when the estimate was calculated. Your actual fuel costs will vary based on your driving, fuel type (premium recommended), and fuel prices.

Real-world expectations

EPA numbers are a benchmark, but real-world fuel economy for the Cayenne S varies. Drivers in congested cities may see below 18 MPG, especially if they often use the engine’s full power. Those driving mainly on the highway at steady speeds might get slightly better than 23 MPG. Aggressive driving, Sport or Sport Plus mode or towing will decrease fuel mileage. Consider the annual fuel cost a starting point as your results will likely vary.

How it compares

The 2019 Porsche Cayenne S has mixed fuel economy compared to its competitors. The BMW X5 xDrive40i, with its 3.0L inline-six turbo, gets a slightly better 22 MPG combined. The Mercedes-Benz GLE 450, also with an inline-six mild-hybrid engine, has similar numbers. The X5 and GLE prioritize comfort and efficiency more than performance, explaining their slight MPG advantage. The Range Rover Sport, a British rival, barely achieves 19 MPG with its supercharged V6, before even considering the V8 models. The Cayenne S buyer cross-shops these vehicles and understands the fuel economy trade-offs when choosing performance-oriented options. They analyze the MPG differences to justify their purchase.

Tips to maximize efficiency

Despite its performance focus, you can still improve fuel economy in your Cayenne S. Avoid aggressive acceleration and braking. The twin-turbo V6 is responsive, making it easy to use boost frequently. Instead, drive smoothly to minimize fuel use.

Proper tire inflation is critical for good fuel efficiency. Check your tire pressure regularly and inflate your tires to the recommended levels, shown in the sticker inside the driver’s side door jamb. Under-inflated tires increase rolling resistance, requiring more fuel. When it’s time for new tires, consider low rolling resistance tires.

Consider using the “Normal” driving mode for everyday driving. Sport and Sport Plus modes improve throttle response and handling but increase fuel use. Normal mode balances performance and efficiency for most driving situations. and become familiar with the auto start/stop system and allow it to function whenever safe and appropriate to do so.

Reduce unnecessary weight in the vehicle. Excess cargo increases the load, making the engine work harder and burn more fuel. Remove items you don’t regularly need. Keeping the air filter clean can also improve engine efficiency. A clogged air filter restricts airflow, reducing the engine’s ability to breathe.

Looking to see all Porsche fuel economy data, or maybe dig into CAYENNE MPG across all years, there are resources here on FuelEconomyHub.com. The 2019 Porsche Cayenne S 2.9L presents a clear choice: performance over pure efficiency. Many buyers gladly make that decision.