16 combined MPG for the 2026 Audi SQ8 4.0L 8-cyl isn’t merely a number; it’s a statement. This isn’t a vehicle engineered for miserly consumption, nor does it pretend to be. Instead, 16 MPG is the cost of entry for a truly exhilarating, brutally fast, and impeccably luxurious performance SUV, a machine that redefines what a family hauler can be. The buyers of the SQ8 aren’t cross-shopping it against hybrid crossovers. They are individuals who demand the visceral thrill of a large-displacement, twin-turbo V8, who prioritize immediate, authoritative power delivery, and who appreciate the advanced engineering that allows such a hefty vehicle to accelerate like a sports car. For them, 16 MPG is a reasonable consequence, a footnote on a spec sheet dominated by horsepower and torque figures, 0-60 times, and premium interior appointments. It’s the price for unflinching autobahn dominance and the sound of that magnificent eight-cylinder engine. This vehicle is about embracing excess, executed with typical Audi precision and understated aggression.

City and highway performance

The EPA rates the 2026 Audi SQ8 at 14 MPG in the city and 20 MPG on the highway, figures that perfectly encapsulate its driving character. The 14 MPG city rating comes as no surprise, piloting a substantial, super-SUV through urban environments frequently involves stop-and-go traffic, rapid acceleration bursts to exploit gaps, and the sheer inertia of its weight. This is where the twin-turbo 4.0L V8 and its accompanying automatic S8 transmission are constantly at work, spooling turbos and shifting gears to keep the colossal power on tap. Highway driving, however, tells a different story. The 20 MPG highway demonstrates the efficiency gains when that potent V8 is allowed to settle into a cruising rhythm. The S8 transmission finds its tallest gears, the cylinder deactivation system can engage more readily, transforming the mighty eight-cylinder into a four-cylinder under light load conditions, and aerodynamic efficiencies play a larger role. While 20 MPG isn’t class-leading for a luxury SUV, it’s commendable for a vehicle boasting such immense performance capabilities. Audi’s engineering balances outright power and acceptable long-distance cruising efficiency for a vehicle of this caliber.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,600 for the 2026 Audi SQ8 4.0L 8-cyl. This figure is derived from an assumption of 15,000 miles driven per year, distributed between city and highway driving, and using national average fuel prices for premium gasoline. For the typical SQ8 owner, this cost is a known quantity, a line item alongside insurance, maintenance, and the vehicle’s substantial purchase price. It’s important to understand that this $3,600 is a benchmark. Individual driving habits, local fuel prices, and specific vehicle use will inevitably cause real-world costs to fluctuate. However, it provides a valuable reference point, solidifying the understanding that high-performance luxury SUVs, particularly those with a twin-turbo V8, come with a commensurate running cost. The buyer of an SQ8 isn’t blindsided by this figure, rather, they factor it into the overall financial commitment of owning such an impressive piece of machinery.

Real-world expectations

Expectations for the 2026 Audi SQ8’s fuel economy in the real world should largely align with the EPA’s estimates, provided typical driving patterns. Those who frequently exploit the full fury of the 4.0L V8, meaning aggressive acceleration, sustained high speeds, and spirited driving on twisty roads, will undoubtedly see figures closer to, or even below, the 14 MPG city rating. This vehicle encourages such driving, and its owners often buy it precisely for that reason. Conversely, drivers who primarily use their SQ8 for long, uneventful highway cruises, maintaining steady speeds and avoiding rapid acceleration, might occasionally exceed the 20 MPG highway figure. The advanced powertrain, with its cylinder deactivation technology, is optimized for these scenarios. However, the sheer weight of the vehicle and the power potential inherent in that twin-turbo V8 mean that even moderate city congestion or an enthusiastic on-ramp merge will quickly remind you of the fuel appetite of a performance-oriented SUV. The SQ8 is not designed to sip fuel, it’s designed to devour pavement. For a comprehensive look at SQ8 MPG across all years, consult our historical data.

How it compares

Comparing the 2026 Audi SQ8’s 16 combined MPG to its direct competitors illuminates its position squarely within the high-performance luxury SUV segment. The Mercedes-AMG GLE 53 Coupe, with its turbocharged inline-six and mild-hybrid assistance, typically achieves around 20 combined MPG, offering a more fuel-efficient package but with less outright grunt than the SQ8’s V8. Stepping up to the BMW X5 M50i, equipped with a twin-turbo V8, brings similar figures, often hovering around 18 combined MPG, a slight edge due to its slightly lighter curb weight and potentially different gearing strategies. The Porsche Cayenne S, with its V8 powertrain, lands in a very similar 17-18 combined MPG range. However, when you consider the more direct rival, the Porsche Cayenne GTS (which also uses a 4.0L twin-turbo V8), the numbers converge very closely, often mirroring the SQ8’s 16 combined MPG. The SQ8’s buyer isn’t just looking at MPG, they’re looking at the complete package: the commanding presence, the technological advancements, the distinctive Audi interior, and that unmistakable V8 soundtrack. Against other full-fat V8 performance SUVs, the SQ8 holds its own, neither dramatically better nor worse. It simply delivers what’s expected for this class of uncompromising vehicle. For all Audi fuel economy data, you can explore our extensive database.

Tips to maximize efficiency

While the 2026 Audi SQ8 isn’t known for fuel efficiency, good driving habits can still yield noticeable improvements. The most significant factor is moderated throttle input, avoid unnecessary heavy acceleration and rapid braking, as these actions compel the twin-turbo V8 to consume significantly more fuel. Gentle, progressive acceleration uses the engine’s torque efficiently and allows the cylinder deactivation system more opportunities to engage.

Use the drive select modes intelligently. While Dynamic mode sharpens throttle response and firms up the suspension, it also encourages more aggressive driving. Comfort or Auto modes will optimize powertrain response for smoother, more relaxed driving, which inherently leads to better fuel economy during daily commutes and routine errands.

Maintain proper tire pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder. Check your SQ8’s tire pressures regularly, ideally once a month, and ensure they meet the manufacturer’s recommendations, which are usually found on a sticker inside the driver’s door jamb.

Plan your routes to minimize unnecessary idling and stop-and-go traffic. Longer, consistent stretches of driving at steady speeds, particularly on highways, allow the powertrain to operate at its most efficient, making the most of the cylinder deactivation and tall gear ratios. Avoiding peak traffic times or congested urban areas can make a substantial difference over time.

Remove any unnecessary weight from the vehicle. While the SQ8 is a heavy vehicle by design, carrying excessive cargo or roof-mounted accessories when not needed adds extra mass and aerodynamic drag, both of which slightly diminish fuel economy. Even small reductions contribute to overall efficiency.