15 MPG combined represents a price to pay, and one that the buyers of the 2021 BMW X6 M Competition are undoubtedly willing to shoulder. No one choosing this snarling, 617-horsepower coupe-SUV expects Prius-like efficiency. They are buying a statement, a performance machine swathed in leather and carbon fiber, and the fuel bill is simply the cost of entry into this exclusive club.

City and highway performance

The EPA estimates the X6 M Competition achieves 13 MPG in the city and 18 MPG on the highway. This disparity reflects the vehicle’s nature. Around town, the immense power of the 4.4-liter twin-turbo V8 encourages frequent bursts of acceleration, quickly diminishing fuel reserves. Out on the open road, using cruise control and a lighter right foot can get you closer to the EPA’s highway figure, but even then, aerodynamic compromises inherent in the coupe-SUV shape work against optimal fuel efficiency. Blame the laws of physics, not BMW’s engineering prowess.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 BMW X6 M Competition at $3,850. This figure is based on driving 15,000 miles per year, using a blend of city and highway driving, and factoring in the national average fuel price for premium gasoline, which this vehicle requires. While a considerable sum, this expense is factored into the ownership costs for those seeking this level of performance and exclusivity. Remember this figure will fluctuate with fuel prices across the country.

Real-world expectations

Expect to see numbers slightly below the EPA estimates in real-world driving. The X6 M Competition begs to be driven aggressively, and resisting that urge is a challenge. Short trips, heavy traffic, and frequent use of the Sport and Sport+ driving modes will all contribute to lower fuel economy. While achieving the stated highway MPG is possible, it requires conscious effort and a disciplined driving style, a rarity for most who choose this vehicle. Consult X6 MPG across all years to see if this is a trend across all model years.

How it compares

Unsurprisingly, the X6 M Competition lags behind its less powerful stablemates and competitors in fuel economy. For example, the standard BMW X6 with the inline-six engine delivers a combined fuel economy in the low 20s. The Mercedes-AMG GLE 63 S Coupe, a direct rival, posts similar EPA ratings, around 15 MPG combined. Even the all-electric BMW iX M60 achieves the equivalent of around 77 MPG combined. However, the mission and character of the X6 M Competition are distinct, prioritizing raw power and driving engagement over outright efficiency. Those cross-shopping a vehicle like this typically are not driven by lower fuel costs. For all Bmw fuel economy data, consult all Bmw fuel economy data.

Tips to maximize efficiency

While the X6 M Competition is not inherently fuel-efficient, some techniques can help minimize trips to the gas station. Avoid aggressive acceleration and braking. The sudden surge of power is addictive, but smooth, deliberate inputs will conserve fuel.

Use the Eco Pro driving mode when appropriate. While it will dampen throttle response and shift points, it can significantly improve fuel economy in steady-state highway driving. It’s unlikely anyone buying an M car will use this mode frequently, but it will help in extended highway trips.

Ensure your tires are properly inflated. Low tire pressure increases rolling resistance, forcing the engine to work harder and consume more fuel. Check tire pressures regularly, especially before long trips.

Minimize idling. Modern engines are designed to be more fuel-efficient when running than when idling. If you’re stopped for more than a minute, consider turning off the engine.

Plan your trips strategically. Combining errands into a single trip avoids multiple cold starts, which consume more fuel. Avoiding peak traffic hours also helps optimize fuel consumption. Although, let’s be honest, the owners of this vehicle probably aren’t strategizing trips.