27 MPG combined isn’t going to win any hypermiling contests, but it’s a genuinely impressive figure for the 2015 BMW X5 xDrive35d. This isn’t a compact hatchback; it’s a sizable, all-wheel-drive luxury SUV capable of hauling a family and their gear in comfort and style. Buyers choose the xDrive35d specifically for its mix of diesel torque, spaciousness, and relative fuel efficiency, accepting the trade-offs inherent in a vehicle of this class.

City and highway performance

The EPA estimates for the 2015 X5 xDrive35d break down to 24 MPG in the city and 31 MPG on the highway. This difference reflects the nature of this vehicle’s powertrain. The 3.0-liter inline-six turbodiesel excels at highway cruising, running at low RPMs thanks to its ample torque and the smooth-shifting eight-speed automatic transmission. City driving, with its stop-and-go traffic and frequent acceleration, naturally takes a toll on fuel economy. However, even in urban environments, the diesel’s inherent efficiency helps maintain respectable numbers. The highway MPG figure is particularly appealing to those who frequently take long road trips, a common use case for X5 owners.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2015 BMW X5 xDrive35d is estimated at $2,050. This calculation is based on driving 15,000 miles per year and using national average fuel prices at the time of testing.

Keep in mind that this is just an estimate, and your actual fuel costs may vary depending on your driving habits, location, and fluctuations in fuel prices. However, it provides a useful benchmark for comparing the X5 xDrive35d to other vehicles in its segment. Remember to check all BMW fuel economy data before making a purchase.

Real-world expectations

While the EPA figures provide a standardized measure of fuel economy, real-world MPG often deviates. Factors such as driving style, traffic conditions, terrain, and even tire pressure can influence fuel consumption. X5 xDrive35d owners generally report figures that are close to the EPA estimates, with some achieving even better highway MPG on long trips. Aggressive driving, frequent short trips, and carrying heavy loads will all negatively impact fuel economy. Averages can vary but consistent feedback shows that it gets close to its MPG. It’s important to set realistic expectations and drive accordingly to maximize fuel efficiency. Checking X5 MPG across all years will help understand the variations.

How it compares

In the realm of mid-size luxury SUVs, the 2015 X5 xDrive35d stands out for its diesel efficiency. Consider the gasoline-powered X5 xDrive35i, which offers similar performance but achieves a lower combined MPG of around 22. The Acura MDX, a popular alternative, manages around 22 MPG combined. Even hybrid competitors like the Lexus RX 450h, while offering superior city MPG, often fall short of the X5 diesel’s highway efficiency. For buyers who prioritize long-distance cruising and fuel economy without sacrificing luxury or capability, the xDrive35d has a distinct advantage. Other diesel competitors, like the Volkswagen Touareg TDI (now discontinued), previously offered similar MPG ratings. The decision hinges on brand loyalty, specific features, and overall driving experience.

Tips to maximize efficiency

Avoid aggressive acceleration and braking. The X5 xDrive35d’s diesel engine produces ample torque at low RPMs, allowing for smooth and efficient acceleration. Anticipate traffic flow and maintain a steady speed whenever possible. Hard acceleration and sudden braking waste fuel and increase wear and tear on your vehicle.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended levels as indicated on the doorjamb sticker or in your owner’s manual.

Minimize idling. Excessive idling consumes fuel and produces unnecessary emissions. If you anticipate being stopped for more than a minute or two, turn off the engine. Modern vehicles, including the X5, are designed to restart quickly and efficiently.

Use cruise control on the highway. Cruise control helps maintain a consistent speed, which can improve fuel economy on long highway stretches. Avoid frequent speed adjustments, and let the vehicle’s system manage throttle input for optimal efficiency.

Consider using BMW’s ECO PRO mode (if equipped). This mode optimizes various vehicle settings to prioritize fuel efficiency, such as throttle response and shift patterns. While it may slightly reduce performance, it can contribute to noticeable fuel savings, especially during city driving.