26 MPG combined is acceptable for the 2025 Audi S3 2.0L 4-cyl, and its drivers probably aren’t shopping based on gas mileage. This is a compact performance sedan designed to deliver thrills, and the MPG is simply part of owning it. S3 buyers want fast acceleration, all-wheel grip, and the understated aggression of its exterior design. This isn’t the vehicle for hypermilers, but understanding its fuel consumption allows for budgeting and perhaps, a few strategic adjustments to driving habits. Those wanting even better mileage should see all Audi fuel economy data.

City and highway performance

The EPA estimates for the 2025 Audi S3 are 23 MPG in the city and 31 MPG on the highway. The city figure reflects the stop-and-go nature of urban environments, where the S3’s turbocharged engine is constantly spooling up and slowing down. The highway MPG demonstrates that the car can achieve respectable efficiency when cruising at a steady speed. In practice, these numbers translate to a range of situations: expect to see city fuel economy dip further during rush hour, while a long highway road trip could easily yield numbers better than 31 MPG, particularly if the S3 is driven conservatively.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2025 Audi S3 is $2,250. This calculation is based on driving 15,000 miles per year and using national average fuel prices. This figure is a useful benchmark for comparing the S3’s running costs to other vehicles in its class, and understanding this number allows prospective buyers to factor this expense into their overall budget. However, individual fuel costs can vary significantly depending on driving habits and local fuel prices. Those interested in historic fuel economy data can review S3 MPG across all years.

Real-world expectations

While the EPA estimates provide a standardized baseline, real-world fuel economy for the S3 depends heavily on driving style. A driver who frequently uses the turbocharger’s power and the S3’s launch control will see figures lower than the EPA estimates. Drivers with a lighter foot and a preference for relaxed cruising can likely match or even exceed the stated MPG. Factors such as weather conditions, tire pressure, and the use of accessories like air conditioning can also influence fuel consumption.

How it compares

Compared to its direct competitors, the 2025 Audi S3 sits in a competitive, but not exceptional, position regarding fuel economy. For example, the BMW M235i xDrive Gran Coupe, another performance-oriented compact, achieves a similar 26 MPG combined rating. The Mercedes-AMG CLA35 also lands in the same ballpark, with around 25 MPG combined. Where the S3 stands out is in its quattro all-wheel-drive system, which provides superior traction and all-weather capability without a massive penalty at the pump. Consider the Honda Civic Si which, while significantly less powerful and luxurious, achieves around 31 MPG combined; a clear indication that performance and fuel efficiency trade blows in this segment. The S3 buyer acknowledges this tradeoff.

Tips to maximize efficiency

Avoid aggressive acceleration and braking. The S3’s turbocharged engine responds directly to throttle inputs, and excessive acceleration burns fuel quickly. Anticipate traffic flow and maintain a steady speed whenever possible. Smooth, predictable driving dramatically improves fuel efficiency.

Maintain optimal tire pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate to the recommended levels, which are typically found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Reduce unnecessary weight. Excess weight in the vehicle burdens the engine, leading to increased fuel consumption. Remove any items from the trunk or back seat that are not essential.

Use the car’s driving modes intelligently. The Audi S3 offers selectable driving modes, including an “Efficiency” mode. Activating this mode adjusts the engine and transmission settings to prioritize fuel economy. Use the “Efficiency” mode while cruising on the highway to maximize fuel savings.

Keep up with routine maintenance. Regular maintenance, such as oil changes and air filter replacements, ensures the engine operates at peak efficiency. A well-maintained engine consumes less fuel and produces fewer emissions.