15 MPG combined isn’t going to win any eco-awards, but for the 2023 BMW X6 M with its 4.4L twin-turbo V8, it’s almost beside the point. This isn’t a vehicle purchased for its fuel sippability. It’s bought for sledgehammer performance wrapped in a coupe-like SUV silhouette, a statement piece for those who crave power and presence above all else.

City and highway performance

The EPA estimates of 13 MPG in the city and 18 MPG on the highway paint a clear picture: the X6 M thrives on open roads. The city figure reflects the engine’s thirst during stop-and-go driving and the inherent inefficiencies of hauling a heavy vehicle from standstill. However, once unleashed on the highway, the X6 M’s powertrain can settle into a more efficient rhythm, relatively speaking. Expect frequent stops at the premium fuel pump regardless of your driving environment, but the highway will at least provide slightly more range between fill-ups. The automatic (S8) transmission makes the most of the engine’s power delivery, but it can’t overcome the laws of physics when pushing this much mass through the air.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 BMW X6 M at $3,850. This figure is based on driving 15,000 miles per year with a 55% city and 45% highway driving split, using the national average fuel price for premium gasoline. Keep in mind that this is just an estimate; your actual fuel costs may vary depending on your driving habits, local fuel prices, and the number of miles you drive annually. If you have a heavy foot or spend most of your time in stop-and-go traffic, expect to exceed this figure significantly. For context, that $3,850 is a considerable expense, likely exceeding the cost of insurance for many drivers.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the X6 M often falls short. Aggressive driving, a common temptation with this much horsepower on tap, will quickly deplete the fuel tank. Expect to see numbers closer to the city estimate even during mixed driving, especially if you live in an urban area with frequent congestion. Those living in more rural environments, with longer stretches of uninterrupted highway driving, may see slightly better figures. The X6 M is designed to provide driving enjoyment and will reward you with plenty of performance, but be aware of how that performance comes at a cost.

How it compares

The X6 M doesn’t exist in a vacuum, and its fuel economy stacks up against its high-performance rivals accordingly. The Mercedes-AMG GLE 63 S Coupe, another mega-horsepower SUV, achieves similar figures, around 15 MPG combined. The Porsche Cayenne Turbo Coupe, while slightly more efficient, still hovers around 17 MPG combined. Ultimately, for buyers considering this class of vehicle, fuel economy is a secondary consideration. They’re prioritizing power, exclusivity, and a distinctive design and are prepared to accept the associated fuel costs. See X6 MPG across all years to compare it to other models.

Tips to maximize efficiency

While the X6 M is not designed for hypermiling, there are still some techniques you can use to improve its fuel economy, however marginal the gains may be. Avoid aggressive acceleration and braking. The X6 M’s powerful engine responds readily to even slight pressure on the accelerator, so a gradual increase in speed will help to conserve fuel. Anticipate traffic conditions and maintain a steady speed whenever possible.

Take advantage of the X6 M’s driving modes. Selecting a more efficient mode, such as Comfort, will alter the engine mapping and transmission shift points to prioritize fuel savings over performance. While it might temper the car’s responsiveness, it can noticeably improve fuel economy, especially during everyday driving. Be mindful of the driving mode selected, and prioritize economy when full performance isn’t needed.

Ensure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly and inflate them to the recommended levels, which can be found on the door jamb sticker or in the owner’s manual. Even a small difference in tire pressure can negatively impact fuel economy.

Reduce unnecessary weight in the vehicle. The heavier the vehicle, the more fuel it consumes. Remove any unnecessary items from the trunk and passenger compartment. While this may seem insignificant, every pound counts, especially in a vehicle as large and powerful as the X6 M. Even removing a few items can make a small difference over time. For all Bmw fuel economy data, you can compare models.