The 2017 Audi A8 L 4.0L 8-cyl achieves 22 MPG combined, a figure that likely isn’t a primary concern for the individual leasing or purchasing this model. This isn’t a car bought for its frugality; it’s bought as a statement of success, prioritizing effortless power, technological advancements, and supreme comfort. The A8 L buyer is likely a C-suite executive, a successful entrepreneur, or someone who appreciates the finer things in life and is willing to pay for them, including the cost of premium fuel.

City and highway performance

The EPA estimates 18 MPG in the city and 29 MPG on the highway for this A8 L configuration. The difference between city and highway figures is largely due to the engine’s cylinder deactivation system, which can shut down four of the eight cylinders under light load conditions, such as cruising on the open road. Stop-and-go city driving demands more power, negating the benefits of this system. Highway performance is aided by the car’s smooth eight-speed automatic transmission, which keeps the engine in its most efficient range at higher speeds. Aggressive acceleration will quickly negate any fuel-saving technology, reminding you that you have a twin-turbocharged V8 at your disposal.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2017 Audi A8 L 4.0L 8-cyl is $2,650. This figure is based on driving 15,000 miles per year and using the national average fuel price at the time of calculation. This is just an estimate, and your actual fuel costs may vary depending on your driving habits, the type of fuel you use (premium is recommended), and local fuel prices. The EPA uses a standardized formula to generate this rating, allowing easy comparison between different models. For those researching all Audi fuel economy data, this is a crucial comparison point.

Real-world expectations

EPA estimates provide a useful baseline, but real-world fuel economy often differs. The technologies in the A8 L, like its quattro all-wheel-drive system and its performance-oriented tuning, tend to encourage a more spirited driving style. A lead foot will significantly reduce fuel economy, potentially dropping below the EPA estimates, especially in city driving. Mindful driving, prioritizing smooth acceleration and maintaining consistent speeds, can help you achieve numbers closer to, or even slightly better than, the EPA highway rating. The type of driving environment plays a crucial role, with longer trips on relatively flat terrain favoring better fuel consumption.

How it compares

The 2017 Audi A8 L 4.0L 8-cyl’s fuel economy is generally competitive within its class. Other drivetrain options impact the average. For example, the BMW 750i xDrive, with a similar twin-turbo V8, achieves a comparable 22 MPG combined. The Mercedes-Benz S550, another direct competitor, is also in the same range. Opting for a V6-powered A8 variant, or even a hybrid version of a competitor such as the Lexus LS 500h (estimated at 28 MPG combined), would yield better fuel economy. Those prioritizing fuel efficiency might consider these alternatives, but are likely to sacrifice some of the raw power and performance that makes the A8 L 4.0T so appealing. Consider checking out A8 MPG across all years to understand model-year differences.

Tips to maximize efficiency

Use the Audi Drive Select system. Experiment with the “Efficiency” mode, which optimizes engine, transmission, and other vehicle settings for maximum fuel conservation. This mode typically dulls throttle response and encourages earlier upshifts, promoting a more relaxed and fuel-efficient driving style.

Be mindful of your tire pressure. Maintaining the correct tire pressure, as indicated on the doorjamb sticker, reduces rolling resistance and improves fuel economy. Check your tire pressure regularly, especially during temperature changes, as fluctuations can affect pressure levels.

Avoid unnecessary idling. Modern engines are designed to be efficient even when starting, so idling for extended periods wastes fuel. If you anticipate waiting for more than a minute, it’s generally more fuel-efficient to turn off the engine. This is particularly relevant in the A8 L, given its larger engine displacement.

Anticipate traffic flow and maintain a steady speed. Frequent acceleration and braking consume more fuel. By anticipating traffic conditions and maintaining a consistent speed whenever possible, you can minimize unnecessary fuel consumption. The A8 L’s adaptive cruise control system can be particularly helpful in maintaining a consistent speed on the highway.

Lighten the load. Excess weight reduces fuel economy. Remove any unnecessary items from the trunk and cabin to reduce the burden on the engine. Every pound counts, particularly in city driving where more energy is required to accelerate the vehicle from a standstill.