22 MPG combined in the 2019 Audi A8 L 3.0L isn’t going to win any hypermiling competitions, but it’s acceptable for what this car is: a supremely comfortable, spacious, and technologically advanced luxury sedan. No one buys an A8 L expecting Prius-like fuel consumption, they buy it for its effortless power, strong build, and the prestige that comes with the four rings on the grille. The fuel bill is simply a cost of entry.

City and highway performance

The EPA estimates that the 2019 Audi A8 L 3.0L achieves 19 MPG in the city and 27 MPG on the highway. The city figure reflects the realities of stop-and-go traffic, where the A8’s weight and the inherent inefficiencies of internal combustion take their toll. The highway number showcases the benefits of the car’s aerodynamic design and the engine’s ability to cruise comfortably at lower RPMs. This split suggests that drivers who spend a significant portion of their time on the open road will see fuel economy closer to, or even exceeding, the EPA highway estimate.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2019 Audi A8 L 3.0L at exactly $2,650. This figure is based on driving 15,000 miles per year and using the EPA’s combined MPG rating in conjunction with national average fuel prices. Keep in mind that your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and local fuel prices. Regularly exceeding EPA’s $2,650/year estimate is likely in areas with high fuel costs, or for those with lead feet.

Real-world expectations

While laboratory tests provide a useful comparison, real-world fuel economy often deviates from EPA estimates. Factors like driving style, traffic conditions, weather, and even tire pressure can all impact fuel efficiency. A driver who accelerates quickly will likely see lower numbers than someone who drives more calmly. Regular maintenance, including timely oil changes and air filter replacements, also helps maximize fuel economy. Looking at A8 MPG across all years can provide a broader context.

How it compares

The 2019 Audi A8 L 3.0L competes in a segment where fuel economy is less important than luxury and performance, but it’s still relevant. The BMW 740i, with its 3.0L inline-six, achieves a similar 24 MPG combined in some years. The Mercedes-Benz S450, with a comparable engine size, typically delivers around 23 MPG combined. The Lexus LS 500h hybrid manages to achieve a significantly better EPA combined rating in the high 20s. These comparisons matter to the A8 buyer because while they prioritize luxury, some competitors offer similar performance with slightly better fuel efficiency. Before making a decision, it pays to see all Audi fuel economy data.

Tips to maximize efficiency

Gentle acceleration is key to maximizing fuel economy in the A8 L. Avoid sudden bursts of speed and try to maintain a steady pace. The turbocharged engine is responsive, but using its full potential will increase your fuel bill.

Use the Audi Drive Select system. Experiment with the different driving modes, particularly the “Efficiency” or “Comfort” mode, which optimizes engine and transmission settings for fuel conservation. These modes typically reduce throttle response and encourage earlier upshifts.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and maintain the recommended pressure listed on your doorjamb sticker.

Reduce unnecessary weight in the vehicle. The A8 L is already a substantial car, so hauling extra cargo can further diminish fuel efficiency. Remove any items that you don’t need, such as golf clubs or heavy tools.

Minimize idling. Idling consumes fuel without covering any distance. If you anticipate being stopped for more than a minute or two, turn off the engine. However, turbos are best cared for by short idling after a long drive to allow the oil to properly cool and prevent coking.