21 MPG combined hangs over the 2018 BMW X6 sDrive35i. It’s not terrible, especially since the X6 isn’t trying to be a fuel-sipping hybrid. This is a coupe-styled SUV – some might even say a tall hatchback – that prioritizes style and driving experience over practicality. Buyers comfortable with this number typically want the elevated driving position and perceived safety of an SUV, but crave something visually distinct with BMW’s signature handling. They’re willing to trade a few MPGs for the exclusivity and driving dynamics that the X6 offers.

City and highway performance

The EPA estimates for the 2018 X6 sDrive35i break down to 18 MPG in the city and 25 MPG on the highway. The city figure reflects the engine idling at stoplights, stop-and-go traffic, and frequent acceleration. It’s inherently lower, given the X6’s weight and the need to overcome inertia from a standstill. The highway figure is more indicative of steady-state cruising. With the 3.0L inline-six humming along at a constant speed, the X6 can stretch a gallon of gasoline a bit further. However, aggressive driving and frequent overtaking – things the X6 encourages – will quickly degrade that highway number.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 BMW X6 sDrive35i at $2,750. This figure is calculated based on driving 15,000 miles per year, using a national average fuel price (which fluctuates constantly). It’s a useful benchmark for comparison, but your individual fuel costs may vary significantly based on your driving habits, the type of fuel you use (premium is recommended), and the actual price of gasoline in your area. Frequent short trips, a heavy foot on the accelerator, and persistent use of Sport mode will inflate that $2,750 figure.

Real-world expectations

While the EPA estimates provide a baseline, real-world MPG can vary. Don’t be surprised if your daily driving yields figures slightly below the official numbers, especially if your commute involves significant stop-and-go traffic. However, those who primarily use the X6 for longer highway journeys may find they can achieve MPG numbers closer to, or even slightly exceeding, the 25 MPG highway estimate. Factors like tire pressure, the use of accessories (air conditioning), and even the specific blend of gasoline can all impact fuel efficiency. It’s best to track your own MPG over time to get a clearer picture of your individual fuel consumption.

How it compares

The 2018 X6’s 21 MPG combined puts it in a similar ballpark to other coupe-styled SUVs, but is lower than that of more traditional luxury crossovers. The Acura MDX, for instance, achieves 22 MPG combined in its standard front-wheel-drive configuration. All-wheel drive in the the X6 xDrive35i creates an even bigger fuel economy gap compared to the rear-wheel drive sDrive35i model. If fuel economy is a top priority, a traditional SUV shape offers less aerodynamic drag and a lighter kerb weight than the X6’s profile. However, X6 buyers accept this compromise for the BMW’s style and performance. Consider the Lexus RX 350, which manages 23 MPG combined. These differences might seem small, but they can add up over the course of a year. Check X6 MPG across all years if you are considering a different year model.

Tips to maximize efficiency

Take advantage of Eco Pro mode. This driving mode adjusts the engine mapping and transmission shift points to prioritize fuel efficiency. Expect slower acceleration and a more relaxed throttle response, but it can make a noticeable difference on longer drives.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressures regularly and inflate them to the recommended levels listed on the driver’s side doorjamb. This may seem like a small thing but consistently maintaining proper pressures will help to see the best fuel economy possible!

Avoid aggressive driving habits. Rapid acceleration, hard braking, and high-speed cruising all consume more fuel. Drive smoothly and anticipate traffic conditions to minimize unnecessary acceleration and braking. Using cruise control on the highway can help maintain a consistent speed and improve fuel efficiency. Find all Bmw fuel economy data to compare against similar models.

Reduce unnecessary weight. Carrying excessive cargo in the trunk or on the roof increases the vehicle’s weight and aerodynamic drag, both of which negatively impact fuel economy. Remove any unnecessary items from the vehicle and consider removing roof racks when not in use. Consider the extra weight when adding aftermarket accessories.

Use premium fuel. While the X6 sDrive35i may not require premium fuel, using it can sometimes result in slightly improved fuel economy and performance. The 3.0L turbocharged engine is designed to run optimally on higher octane fuel, and consistently using premium gasoline can help prevent engine knocking and maintain peak efficiency.