21 MPG combined from the 2017 Porsche 911 Turbo S isn’t going to win any hypermiling contests, but that’s not the main point. This is a machine engineered for fast performance, and fuel economy is secondary for those who can afford the price. This clientele values raw speed and handling above all else. They understand the trade-off, embracing it because if mileage mattered more than the thrill, they would be somewhere else.

City and highway performance

The EPA estimates for the 2017 911 Turbo S are 19 MPG in the city and 24 MPG on the highway. These figures are from a mix of driving conditions, from stop-and-go traffic to cruising. Even achieving these numbers requires some restraint, considering the Turbo S’s power. Use launch control a few times, and those figures will drop fast. The 3.8L flat-six with its turbochargers are always ready to deliver instant acceleration, making fuel-sipping a constant battle.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,750 for the 2017 Porsche 911 Turbo S. This is based on driving 15,000 miles per year and using the national average fuel price for premium gasoline. This is just an estimate, as actual fuel costs will vary depending on your driving, the price of gasoline, and how often you unleash the Turbo S’s potential.

Real-world expectations

While the EPA provides a baseline, real-world fuel economy can change. Drivers who often exploit the car’s performance should expect numbers closer to the city estimate, or even lower. However, those prioritizing smooth highway cruising may see numbers slightly above the EPA’s 24 MPG rating. Fuel economy is a matter of personal driving style. Given the car and the fun, don’t be surprised if the fuel economy is lower than expected.

How it compares

Compared to other performance coupes, the 2017 911 Turbo S has similar fuel consumption. For example, a 2017 Audi R8 V10 Plus delivers an EPA-estimated 16 MPG combined. A 2017 Mercedes-AMG GT S is slightly better at approximately 18 MPG combined. The base 911 Carrera achieves a more respectable 22 MPG combined. However, buyers considering the Turbo S aren’t cross-shopping with the base Carrera. They are looking for performance regardless of all Porsche fuel economy data or even 911 MPG across all years. The Turbo S offers that, and its fuel economy is an acceptable trade-off.

Tips to maximize efficiency

Employing a light foot on the accelerator is critical. It’s tempting to accelerate aggressively with the Turbo S’s power, but gentle acceleration minimizes fuel consumption, mainly in city driving. Anticipate traffic flow, avoid sudden braking, and maintain a consistent speed.

Use the car’s driving modes to your advantage. The “Normal” mode prioritizes fuel efficiency by optimizing engine mapping and transmission behavior. While it won’t transform the Turbo S into a Prius, it can help reduce fuel consumption during everyday driving. Avoid driving in “Sport” or “Sport Plus” unless you’re on a track.

Ensure your tires are properly inflated. Under-inflated tires increase rolling resistance, leading to decreased fuel economy. Check your tire pressures regularly and maintain them at the levels specified in your owner’s manual.

Minimize unnecessary weight. Carrying cargo increases fuel consumption. Remove any items you don’t need, as every extra pound contributes to increased fuel usage.