The 2021 Audi SQ8 4.0L 8-cyl gets 17 MPG combined. To be clear, you’re not buying an SQ8 because you prioritize fuel efficiency. You’re buying it for the 500-horsepower turbocharged V8, the stunning design, and the ability to rocket to 60 mph in roughly 4 seconds while carrying five adults in comfort. Fuel economy is simply the price of admission.

City and highway performance

The EPA estimates the SQ8 at 15 MPG in the city and 21 MPG on the highway. The city figure reflects the energy required to repeatedly accelerate the SQ8’s weight from a standstill. The highway number is more palatable, but even here, the SQ8’s powerful engine will consume fuel faster than a smaller four-cylinder or even a six-cylinder. This is because the engine is designed for performance first, and fuel consumption second.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Audi SQ8 4.0L 8-cyl at $3,400 per year. This figure is based on driving 15,000 miles annually, a blend of city and highway driving, and the national average fuel price. Note that premium fuel is required for optimal performance in the SQ8, meaning fluctuations in premium fuel prices will directly impact this annual cost. Aggressive driving will cause that number to drastically increase.

Real-world expectations

While the EPA provides a standardized test cycle, real-world fuel economy can vary depending on driving habits, traffic conditions, and the weather. Drivers with a heavier foot or those who frequently drive in stop-and-go traffic will likely see fuel economy figures below the EPA estimates. Conversely, drivers who primarily use the SQ8 for longer highway trips and practice smooth acceleration and consistent speeds may see slightly better results. It’s unlikely anyone is averaging much over 21 MPG in day-to-day use. Check out SQ8 MPG across all years for more information.

How it compares

The SQ8 occupies a unique space, blending performance with luxury and SUV practicality. The BMW X5 M50i features a similar performance profile and returns a comparable 16 MPG combined. The Mercedes-AMG GLE 53 Coupe offers a slightly more efficient option, with a combined EPA rating of 20 MPG, but it falls short of the SQ8’s outright power. Even the less-powerful Audi Q8, with its six-cylinder engine, only manages a combined 19 MPG, demonstrating that the SQ8’s focus is clearly on performance over economy. The gains in MPG by downsizing the engine aren’t massive. Buyers in this segment understand this tradeoff, prioritizing power and driving enjoyment even accepting the higher fuel costs involved. For all Audi fuel economy data, see our make hub.

Tips to maximize efficiency

One of the simplest ways to improve fuel economy in your SQ8 is to adopt a smoother driving style. Avoid sudden acceleration and hard braking, as these consume more fuel. Anticipate traffic flow and maintain a consistent speed whenever possible.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which reduces fuel efficiency. Check your tire pressure regularly, especially during temperature changes.

Reduce unnecessary weight in the vehicle. Carrying extra cargo can negatively impact fuel economy. Remove any items you don’t need to lighten the load and improve efficiency. Even small weight reductions can make a difference over time.

Use the SQ8’s drive select modes carefully. While the “Dynamic” mode unleashes the full potential of the engine, it also maximizes fuel consumption. Opt for “Comfort” or “Efficiency” mode in less demanding driving situations to prioritize fuel economy.

Consider limiting idling time; modern engines are designed to be efficient even when started and stopped, so avoid idling for extended periods. If you’re stopped for more than a minute, turn off the engine to save fuel.