Owning a 2021 BMW X6 M50i with its 4.4L 8-cylinder engine means accepting 18 MPG combined. This isn’t a fuel-efficient vehicle, and it’s likely not the primary reason someone chooses this model. The X6 M50i appeals to drivers who value performance, distinctive styling, and a strong presence, and are willing to accept lower fuel economy in return.

City and highway performance

The EPA estimates 16 MPG in the city and 22 MPG on the highway, which shows where the X6 M50i consumes the most fuel. Stop-and-go traffic and quick acceleration significantly lower the city MPG. The highway estimate reflects the engine’s ability to cruise efficiently at steady speeds, helped by the smooth eight-speed automatic transmission. Drivers who mainly drive in cities can expect more frequent fuel stops than those who mostly use the X6 M50i for highway trips.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 BMW X6 M50i at $3,200. This is based on 15,000 miles per year and national average fuel prices. This is a large expense compared to more fuel-efficient vehicles and should be considered in the overall cost. Buyers who are used to paying less for gas might be surprised by this cost. However, X6 M50i buyers likely already know this and consider it an acceptable cost for the performance and prestige the vehicle offers.

Real-world expectations

While the EPA provides a benchmark, real-world fuel economy can change based on driving habits, traffic, and weather. Fast acceleration, hard braking, and long idling will lower MPG compared to the EPA estimates. Cold weather can also reduce fuel economy because of more engine friction and the use of heated seats and the windshield defroster. Owners of the X6 M50i may see their actual fuel economy drop slightly below the EPA estimates, especially if they often use the engine’s power.

How it compares

When shopping around, buyers might consider the Mercedes-Benz GLE 450 Coupe, which offers similar performance and styling with a slightly better EPA combined rating of 21 MPG. The Porsche Cayenne Coupe, specifically the Cayenne S trim, delivers similar power and handling while achieving around 19 MPG combined. Even within BMW, the X5 M50i offers slightly better fuel economy, although the difference isn’t significant because it is less focused on styling and more on practicality. The X6 M50i buyer often prioritizes the vehicle’s specific styling, so other traditional SUVs are not even considered. Be sure to check X6 MPG across all years.

Tips to maximize efficiency

Smooth and consistent acceleration is key to better fuel economy in the X6 M50i. Avoid fast starts and hard braking, which consume more fuel. Anticipate traffic and maintain a steady speed when you can.

Use the X6 M50i’s driving modes. The “Eco Pro” mode can change the engine and transmission to focus on fuel efficiency instead of performance. It might slightly reduce the driving experience, but it can make a difference on longer trips. Even small changes can add up, especially if you look at all Bmw fuel economy data.

Make sure your tires have the correct pressure. Underinflated tires increase rolling resistance, which makes the engine work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended levels in the owner’s manual or on the driver’s side doorjamb.

Reduce weight. Carrying extra cargo in the X6 M50i increases the vehicle’s weight, which increases fuel consumption. Remove items you don’t need for your regular trips.

Avoid long idling periods. Running the engine while stopped consumes fuel without moving the vehicle. If you expect to be stopped for more than a minute or two, turn off the engine.