18 MPG combined is what you get with the 2023 Porsche Cayenne Turbo S e-Hybrid. It’s a significant figure, but it’s a trade-off that Cayenne Turbo S e-Hybrid buyers accept for the car’s blend of supercar performance, SUV practicality, and plug-in hybrid capability. These buyers want fast acceleration and the Porsche brand, but also need space for family and cargo, and to use less gas, at least that’s the idea.

City and highway performance

The EPA estimates the 2023 Cayenne Turbo S e-Hybrid at 17 MPG in the city and 20 MPG on the highway. These numbers are due to the strong output of the twin-turbocharged 4.0-liter V8 engine with an electric motor. In city driving, regenerative braking and electric assist can save fuel. However, the vehicle’s weight and the desire to use its power reduce efficiency. On the highway, aerodynamics are more important, and while 20 MPG is possible, driving faster or accelerating often will lower fuel economy. Drivers who want efficiency will spend time in electric-only mode, if they can, but the V8 sound is tempting.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Porsche Cayenne Turbo S e-Hybrid at $3,200. This is based on driving 15,000 miles per year and using average fuel prices. It’s a good way to compare, but fuel costs will change based on driving, local prices, and how much the car is driven in electric-only mode. Premium fuel is required, and owners likely drive in a performance-oriented style, so exceeding this annual cost is likely for most.

Real-world expectations

The EPA figures are a starting point, but real-world fuel economy for the Cayenne Turbo S e-Hybrid will vary. Drivers who often use the electric-only range and recharge the battery can improve their fuel consumption. However, those who mostly use the gasoline engine and drive fast should expect numbers closer to the lower end of the EPA estimates, or even lower. The joy of using the 670 horsepower and 663 lb-ft of torque is often more important than good fuel efficiency. The driver’s personality and driving environment determine actual mileage.

How it compares

Compared to its competitors, the Cayenne Turbo S e-Hybrid is unique. The BMW X5 M Competition has similar performance, but no plug-in hybrid, and gets around 15 MPG combined. The Mercedes-AMG GLE 63 S Coupe also has comparable performance and luxury but gets only 17 MPG combined. Electric SUVs like the Tesla Model X have better efficiency and no emissions, but lack the V8’s visceral appeal. The Range Rover Sport P510e plug-in hybrid is a closer comparison, with an EPA-estimated 19 MPG combined, but the Porsche’s performance is better. These comparisons show the tradeoffs of the Cayenne Turbo S e-Hybrid: fuel economy is sacrificed for performance and plug-in hybrid benefits, which its target buyer accepts. You can also explore CAYENNE MPG across all years to compare this model with previous generations.

Tips to maximize efficiency

Use the E-Charge mode carefully. This mode recharges the battery while driving, but it makes the engine work harder and can lower overall fuel economy. Use it only when you expect to drive in electric-only mode later. Charging when possible is better for most drivers.

Pre-condition the cabin before driving. Use the Porsche Connect app to pre-heat or pre-cool the cabin while the car is charging. This reduces the energy the battery needs once you start driving, increasing electric range and lowering fuel consumption.

Drive in electric mode when you can. For short trips and city driving, use electric mode to lower fuel consumption and emissions. Use regenerative braking by predicting stops and lifting off the accelerator early. This captures energy and increases the electric driving range.

Check tire pressure often. Underinflated tires increase rolling resistance, which lowers fuel economy. Check your tire pressure at least once a month and keep it at the recommended levels listed on the door. This can improve fuel efficiency.

Avoid fast driving. The Cayenne Turbo S e-Hybrid can accelerate quickly, but frequent hard acceleration and braking lower fuel economy. Drive smoothly and predict traffic to save energy. You can also check all Porsche fuel economy data to see other models within the Porsche lineup.