25 MPG combined isn’t going to win any economy contests, but for the 2019 Audi A6 quattro 3.0L 6-cyl, it’s an acceptable tradeoff. This car doesn’t target Prius-like fuel efficiency; it’s an all-wheel-drive sedan with quick acceleration, advanced technology, and a refined driving experience. Buyers in this class want performance and luxury, and accept a certain level of fuel consumption that economy-car shoppers would reject. Factors they value include the quattro all-wheel drive, the easy power of the turbocharged V6, and the Audi brand.

City and highway performance

The EPA estimates for the 2019 A6 quattro 3.0L break down to 22 MPG in the city and 29 MPG on the highway. This difference is due to the engine and drivetrain’s behavior. In the city, frequent stops and starts and accelerating from a standstill use more fuel. The turbocharger operates often, and the automatic transmission shifts frequently to keep up momentum. However, on the highway, the A6 is more efficient when cruising. The engine runs at lower RPMs, and the car’s aerodynamics reduce wind resistance. The observed highway number is respectable for a vehicle of this size and performance, making it a comfortable and relatively economical choice for long trips.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Audi A6 quattro 3.0L at precisely $2,300. This is based on driving 15,000 miles per year, using a national average fuel price. Remember that this is just an estimate, and your actual fuel costs will differ based on your driving, the type of fuel you use, and local fuel prices. Someone who mainly drives in city traffic will likely spend more than $2,300, while someone who mainly does highway driving may spend less. The $2,300 benchmark gives a useful comparison when looking at the A6 against its competitors and considering its overall cost.

Real-world expectations

The EPA numbers provide a standard for comparison, but real-world driving greatly affects fuel economy. If you often drive above the speed limit or accelerate quickly, don’t expect to always get 29 MPG on the highway. Stop-and-go city driving can easily lower the average to below 22 MPG. The A6’s trip computer shows real-time and average fuel economy, letting you monitor your habits and adjust them. With careful driving, you can likely match or slightly exceed the EPA estimates, while aggressive drivers will see lower numbers. Many owners report that achieving the stated combined MPG is possible with mixed driving. See A6 MPG across all years and owner forums to get a wider sense of what to expect.

How it compares

The A6’s fuel economy is similar to its competitors in the mid-size luxury sedan class. The BMW 540i xDrive, with its similar inline-six engine and all-wheel drive, gets an EPA-estimated 25 MPG combined, like the A6. The Mercedes-Benz E450 4MATIC achieves 26 MPG combined. The Genesis G80 3.5T AWD rates 20 combined. These numbers may seem close, but even 1 or 2 MPG can add up over a year, affecting fuel costs. The Acura TLX SH-AWD Advance gets 24 MPG combined, and the Lexus ES 350 nets 26 MPG combined. A6 buyers aren’t cross-shopping for a Prius. They’re weighing the tradeoffs between performance, technology, and luxury, with fuel economy only being one factor. They understand all Audi fuel economy data highlights AWD and driving dynamics.

Tips to maximize efficiency

Use the Audi Drive Select system. Selecting “Efficiency” mode adjusts the engine, transmission, and other systems to prioritize fuel economy. This mode often reduces throttle response and shifts earlier to keep the engine in its most efficient range. Select this setting when cruising or when saving fuel is the most important thing.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, making the engine work harder and use more fuel. Check your tire pressure often and inflate them to the manufacturer’s specifications, found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Avoid aggressive driving. Quick acceleration, hard braking, and speeding greatly reduce fuel economy. Drive smoothly and anticipate traffic to reduce unnecessary acceleration and braking. Smooth, consistent driving is key to fuel efficiency.

Reduce idling. Idling for long periods wastes fuel without going anywhere. If you’re stopped for more than a minute, turn off the engine. Modern cars restart quickly and efficiently, so you won’t waste fuel or damage the starter.

Keep up with regular maintenance. Regular maintenance, like oil and air filter changes and spark plug replacement, helps the engine run at its best. A well-maintained engine is more efficient. Follow the maintenance schedule in the owner’s manual.