25 MPG combined won’t win any hypermiling contests. But for the 2025 BMW X5 xDrive40i with its smooth 3.0L inline-six, it’s a reasonable compromise between performance and efficiency. This isn’t a vehicle bought by someone solely focused on minimizing their carbon footprint. Instead, the X5 xDrive40i attracts buyers seeking a premium driving experience, ample space for passengers and cargo, and the security of all-wheel drive, all in a stylish and technologically advanced package.

City and highway performance

The EPA estimates the X5 xDrive40i will achieve 23 MPG in the city and 27 MPG on the highway. These figures reflect the characteristics of the turbocharged inline-six engine. In urban environments, the engine’s stop/start system, while sometimes noticeable, helps save fuel when idling. On the open road, the X5’s aerodynamic design and the engine’s efficient operation at cruising speeds contribute to the higher highway figure. The smooth-shifting eight-speed automatic transmission (S8) also plays a crucial role, keeping the engine in its optimal RPM range for fuel efficiency, whether accelerating onto the freeway or maintaining a steady pace.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2025 BMW X5 xDrive40i at exactly $2,300. This figure is based on driving 15,000 miles per year and using the national average fuel prices at the time of calculation. Your actual fuel expenses will vary depending on your driving habits, the type of roads you typically travel, and the price of gasoline in your area. However, the $2,300 provides a useful benchmark for comparing the X5’s running costs to those of its competitors. See all Bmw fuel economy data here.

Real-world expectations

EPA estimates provide a standardized comparison. Real-world fuel economy often differs. X5 drivers who frequently drive aggressively or spend a lot of time in stop-and-go traffic are likely to see figures slightly below the EPA estimates. Those who prioritize smooth acceleration, anticipate traffic conditions, and consistently use cruise control on the highway may achieve results closer to, or even slightly above, the official ratings. The X5’s trip computer provides real-time fuel consumption data, allowing drivers to monitor their efficiency and adjust their driving style.

How it compares

In the competitive mid-size luxury SUV segment, the X5 xDrive40i’s fuel economy is in the middle of the pack. The Acura MDX, often praised for its value and reliability, achieves a combined 22 MPG with its standard engine. The Lexus RX 350, another popular choice, manages around 25 MPG combined. The Mercedes-Benz GLE 350 yields similar results to the X5, hovering around 24 MPG. Buyers cross-shopping these vehicles should also consider the plug-in hybrid X5 xDrive50e, which offers better fuel economy in hybrid mode and can travel a limited distance on electric power alone. Remember to check X5 MPG across all years before making a purchase.

Tips to maximize efficiency

Use the X5’s selectable driving modes. “Eco Pro” mode optimizes various vehicle systems, including throttle response and transmission behavior, to prioritize fuel efficiency. It might slightly reduce performance, but it can make a noticeable difference in mileage, especially during long highway journeys.

Make sure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressures regularly and keep them at the recommended levels. You can find them on a sticker inside the driver’s side door jamb.

Avoid unnecessary idling. Modern engines are designed to be efficient, and restarting them consumes less fuel than letting them idle for extended periods. If you anticipate being stopped for more than a minute or two, turn off the engine to save fuel.

Minimize the use of accessories. The air conditioning system places a significant load on the engine, reducing fuel economy. Whenever possible, use the ventilation system instead of the A/C, or lower the temperature setting to reduce how hard the compressor works.