22 MPG combined won’t top any fuel economy charts in 2023, but it’s an acceptable trade-off for the Audi S6. This isn’t a hybrid, but a sharply styled, genuinely quick performance sedan with a tastefully appointed cabin and an all-wheel-drive system. Buyers in this segment are willing to trade some efficiency for the S6’s blend of athleticism and luxury.

City and highway performance

The EPA estimates for the 2023 Audi S6 2.9L 6-cyl are 19 MPG in the city and 26 MPG on the highway. The city figure reflects stop-and-go driving, where the S6’s turbocharger works harder and the automatic transmission shifts often. The highway number is more appealing, suggesting the S6’s easy cruising ability. The eight-speed automatic transmission helps by selecting higher gears to keep the engine in its most efficient range at steady speeds. Factors that can influence these numbers include driving style, traffic, and terrain. Hilly areas will likely reduce fuel economy compared to flat highways. To see all Audi fuel economy data, visit FuelEconomyHub.com.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Audi S6 will be $2,650. This is based on driving 15,000 miles per year and uses the national average fuel price. If you drive more than 15,000 miles annually, or if fuel prices in your area are higher, your actual fuel costs will be higher. The S6 also requires premium fuel, which is more expensive than regular, contributing to the higher annual fuel cost compared to more efficient vehicles. The S6’s performance requires more readily available fuel.

Real-world expectations

While the EPA estimates provide a standard, real-world fuel economy varies. Aggressive driving, frequent short trips, and long idling periods can all hurt fuel consumption. Mindful driving habits, like anticipating traffic and avoiding quick acceleration, can help improve fuel economy closer to the EPA estimates. Expect a combined MPG in the low 20s with mixed driving. Some owners may exceed the 26 MPG highway figure on long road trips, especially with cruise control. The S6 is responsive, which can lead to enthusiastic driving and lower MPG.

How it compares

The Audi S6 competes with other performance sedans. The BMW M550i xDrive delivers similar performance but gets an EPA-estimated 20 MPG combined. The Mercedes-AMG E53 Sedan offers a slightly better 24 MPG combined. Even within Audi, the A6 allroad shares the S6’s platform but offers more cargo space and is less sporty, achieving 21 MPG combined. The S6 is not the most fuel-efficient choice, but its performance, luxury, and technology attract buyers who value these features. Check S6 MPG across all years to see how the model has evolved.

Tips to maximize efficiency

Use the Audi Drive Select system. Try the “Efficiency” drive mode, which optimizes engine and transmission settings for maximum fuel savings. “Dynamic” mode releases the S6’s full potential, but “Efficiency” during normal driving can improve fuel economy.

Check tire pressure often. Underinflated tires increase rolling resistance, making the engine work harder and burn more fuel. Check the sticker on the driver’s side doorjamb for the recommended tire pressure. This simple step can improve fuel economy.

Avoid idling. When stopped for more than a minute, turn off the engine. Modern engines restart quickly, and prolonged idling wastes fuel, especially in cities with traffic.

Plan routes well. Combine errands and avoid rush hour. This reduces stop-and-go driving, which hurts fuel economy. Use navigation apps with real-time traffic to optimize routes.

Remove unnecessary items from the trunk and cabin. Extra weight increases fuel consumption. A lighter vehicle needs less energy to accelerate, improving efficiency, especially in city driving.