24 MPG combined isn’t going to win any green awards, but it’s an acceptable figure for the 2020 Audi A6 quattro with the 3.0L six-cylinder engine. This isn’t a car purchased by hypermilers seeking ultimate efficiency; it’s a statement of taste, advanced technology, and confident performance. The typical A6 3.0T buyer prioritizes a smooth and powerful driving experience, a supremely comfortable interior, and the cachet of the four rings. Economy is a consideration, but it ranks well below these other attributes.

City and highway performance

The EPA estimates for the 2020 Audi A6 3.0T quattro land at 22 MPG in the city and 29 MPG on the highway. The city number reflects the stop-and-go nature of urban driving, where the engine’s start-stop system works diligently to conserve fuel when the car is at a standstill. The highway figure is more impressive, showcasing the engine’s ability to cruise efficiently at higher speeds, aided by the smooth-shifting seven-speed automatic transmission. This transmission is tuned for both responsiveness and fuel economy, selecting the optimal gear to balance power delivery and efficiency. The quattro all-wheel drive system, while contributing to the car’s surefootedness in all weather conditions, adds a slight penalty to fuel consumption when compared to front-wheel-drive alternatives.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 Audi A6 3.0T quattro at precisely $2,400. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. The actual cost may vary depending on individual driving habits, local fuel prices, and the type of fuel used. While this number might seem high compared to more fuel-efficient vehicles, it’s a reasonable price to pay for the performance and luxury offered by the A6 3.0T. Owners concerned about fuel costs could explore other A6 variants, or perhaps even consider viewing all Audi fuel economy data.

Real-world expectations

While the EPA estimates provide a useful benchmark, real-world fuel economy can vary significantly based on driving style and conditions. Aggressive acceleration, frequent hard braking, and prolonged idling will all negatively impact fuel consumption. Conversely, smooth driving with consistent speeds and minimal idling can improve fuel economy beyond the EPA estimates. The A6’s drive mode selector allows drivers to choose between different profiles, including an “Efficiency” mode that optimizes the engine and transmission for maximum fuel savings. In real-world testing, many drivers report numbers close to the EPA’s estimates, however, adjust expectations based on individual driving habits.

How it compares

In the competitive mid-size luxury sedan segment, the 2020 Audi A6 3.0T quattro’s fuel economy is generally competitive but not class-leading. The BMW 540i xDrive, a direct competitor with a similar six-cylinder engine and all-wheel drive, achieves an EPA-estimated 25 MPG combined, slightly better than the A6. The Mercedes-Benz E450 4MATIC also rings in at 25 MPG combined. Audi holds an edge in many consumer’s eyes in cabin design and tech features. For those prioritizing fuel efficiency above all else, the A6 hybrid options, or even a different segment of vehicles, might present a more appealing option. Reviewing the A6 MPG across all years might inform your impression of this vehicle’s fuel performance.

Tips to maximize efficiency

Use the Audi Drive Select system. Selecting “Efficiency” mode will remap the throttle response, shift points, and climate control settings to prioritize fuel savings, without sacrificing too much performance for daily driving.

Monitor your tire pressure regularly. Underinflated tires increase rolling resistance, which leads to lower fuel economy. Consult the sticker on the driver’s side doorjamb for the recommended tire pressure and ensure that your tires are properly inflated.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume significantly more fuel than smooth, gradual inputs. Anticipate traffic flow and maintain a consistent speed whenever possible. The A6 is more than capable of spirited driving, but it comes at a cost.

Minimize idling time. If you’re stopped for more than a minute, turn off the engine. The A6’s start-stop system automatically shuts off the engine at stoplights and restarts it when you release the brake pedal, helping to save fuel in urban environments. Make sure this feature is enabled.

Lighten the load. Remove any unnecessary items from the trunk and passenger compartment. Extra weight decreases fuel efficiency. Keep the vehicle clear of non-essential weight to improve efficiency on every trip.