17 MPG combined is the price of owning a 2022 Audi S8. The S8 is about effortless power and all-weather confidence, swaddling occupants in luxury while delivering relentless performance. Its fuel consumption reflects that reality. No one buying a six-figure, hand-finished, twin-turbo V8 super sedan expects Prius-like efficiency. Good gas mileage is simply not the S8’s goal.

City and highway performance

The EPA estimates 14 MPG in the city and 23 MPG on the highway for the 2022 Audi S8. The city figure reflects the S8’s weight and how much fuel its engine uses in stop-and-go traffic. The highway number is more reasonable, and achievable on long trips, thanks to the engine’s cylinder deactivation system and the transmission’s ability to settle into high gears. However, drivers with a heavy foot will likely see numbers far below these estimates, no matter where they drive.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 Audi S8 at exactly $3,400. This is based on driving 15,000 miles per year with a 55/45 split between city and highway driving, using national average fuel prices. Remember that this is just an estimate. Your individual fuel costs will vary depending on your driving habits, the type of fuel you use, and the price of gasoline. Those who drive mostly in the city, or who regularly drive the S8 hard, should expect to spend more. For a detailed look at all Audi fuel economy data, this site offers detailed information.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the S8 depends on driving style. Drivers who often use the S8’s “Dynamic” mode and enjoy the twin-turbo V8 will see lower MPG. On the other hand, those who mostly use the “Comfort” mode and drive more gently can get closer to, or even slightly exceed, the EPA estimates. The S8 needs premium fuel, which further increases the cost per mile.

How it compares

The S8’s fuel economy is predictably lower than many competitors because of its focus on performance. The BMW M760i, with its V12 engine, gets a similar 16 MPG combined. A Mercedes-AMG S63, another high-performance sedan, achieves around 19 MPG combined. Even the milder Mercedes-Benz S500 gets only 24 MPG combined, showing the tradeoff between power and efficiency in this class. Checking S8 MPG across all years can also provide valuable context when making comparisons.

Tips to maximize efficiency

Effectively use the Audi Drive Select system. The “Comfort” and “Auto” modes prioritize lower fuel costs by optimizing throttle response, transmission mapping, and suspension settings. Resist the urge to constantly drive the S8 to its full potential, especially in city driving. Smooth, gentle acceleration and anticipating traffic will improve fuel economy.

Make sure the tires are properly inflated according to the manufacturer’s specifications, usually found on the driver’s side doorjamb. Underinflated tires increase rolling resistance, which hurts fuel economy. Regularly checking and keeping the right tire pressure is a simple way to save gas.

Avoid unnecessary idling. If you’re stopped for more than a minute, turn off the engine. Modern engines restart quickly, and idling wastes gas. This matters most in cities with frequent stops.

Reduce aerodynamic drag. Take off roof racks or cargo carriers when not in use, as they increase wind resistance and hurt fuel economy, especially at highway speeds. Keeping the S8’s profile uncluttered will help its efficiency on long trips.