23 MPG combined won’t win any hypermiling competitions, but for the 2020 Audi S5, it’s an acceptable compromise between performance and efficiency. This isn’t a car for those prioritizing fuel savings above all else; rather, it appeals to drivers who want a stylish, sporty coupe or Sportback with the added benefit of confidence in all weather thanks to Audi’s quattro all-wheel-drive system.

City and highway performance

The EPA estimates the 2020 Audi S5 at 20 MPG in the city and 27 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, where the S5’s 3.0-liter turbocharged V6 engine, producing 349 horsepower, spends more time idling or accelerating from a standstill. The highway figure showcases the engine’s ability to cruise efficiently at steady speeds, particularly with the smooth-shifting eight-speed automatic transmission in its highest gear. While 27 MPG isn’t groundbreaking, it allows for decent range on longer road trips, minimizing the need for frequent fuel stops. Remember that achieving the rated highway number requires a light foot and sticking to posted speed limits.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Audi S5 at exactly $2,500. This figure is based on driving 15,000 miles per year and using national average fuel prices for premium gasoline, which is required for optimal performance in the S5. Of course, individual fuel costs will vary depending on driving habits, local fuel prices, and the specific mix of city versus highway driving. Drivers who frequently drive fast or spend a significant amount of time in congested traffic can expect to exceed this estimate. However, those who primarily drive on the highway and drive conservatively might see slightly lower annual fuel costs. But $2,500 is the benchmark to consider as you assess S5 ownership costs.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy often varies. Some drivers state that the S5 can achieve close to its rated 27 MPG on the highway during longer trips when driven responsibly. However, getting near the 20 MPG city figure requires restraint; enthusiastic use of the throttle, especially with the engaging exhaust note, will reduce fuel economy in urban environments. Some owners have reported averaging in the low 20s in combined driving, falling short of the EPA’s 23 MPG rating. This variation highlights the importance of considering your driving patterns when assessing the potential fuel costs of owning an S5. You can also browse S5 MPG across all years to see trends for this model.

How it compares

The Audi S5 exists in a competitive segment of performance-oriented coupes and Sportbacks, and its fuel economy reflects that. For example, the BMW 440i xDrive Coupe, a direct competitor with a similar turbocharged inline-six engine, achieves an EPA-rated 26 MPG combined, slightly better than the S5. Another comparable vehicle, the Mercedes-AMG C43 Coupe, comes in around 22 MPG combined. Buyers often cross-shop these vehicles, and fuel economy can be a differentiating factor, even if it isn’t the primary one. The S5 offers the advantage of quattro all-wheel drive as standard, making it especially appealing in areas with inclement weather; competitors’ AWD systems may come as an optional extra. Opting for larger wheel sizes on some of the competitors may further diminish their fuel economy, reducing any advantage on paper.

Tips to maximize efficiency

Use the Audi Drive Select system. This allows you to choose different driving modes, including an “Efficiency” mode that optimizes engine and transmission settings for improved fuel economy. Selecting this mode softens throttle response, reduces peak boost, and encourages earlier upshifts, which contribute to reduced fuel consumption, especially in city driving.

Monitor your tire pressure regularly. Underinflated tires create more rolling resistance, forcing the engine to work harder and consume more fuel. Use a reliable tire pressure gauge and inflate your tires to the recommended pressure specified on the doorjamb sticker or in the owner’s manual. This simple maintenance task can have a noticeable impact on fuel economy, as well as tire wear.

Anticipate traffic flow and avoid aggressive acceleration and braking. Gradual acceleration and smooth braking not only improve safety and reduce wear and tear on your vehicle, but they also contribute to better fuel economy. Avoid sudden bursts of speed or hard braking whenever possible. Look ahead and anticipate changes in traffic flow to maintain a steady speed.

Limit the use of accessories such as air conditioning and heated seats. These features place an additional load on the engine, increasing fuel consumption. While they are convenient and comfortable, use them carefully, especially during shorter trips. Consider opening the windows or using the ventilation system instead of the air conditioning when the weather permits.

Keep up with routine maintenance. Regular oil changes, air filter replacements, and spark plug maintenance help ensure that your engine is running at peak efficiency. Consult your owner’s manual for the recommended maintenance schedule and follow it closely. A well-maintained engine operates more smoothly and efficiently, maximizing fuel economy. Compare all Audi fuel economy data to other brands.