21 MPG combined probably won’t excite most 2017 BMW X5 sDrive35i buyers. It’s not a Prius, and those shopping for a mid-size luxury SUV with a strong inline-six engine aren’t prioritizing high fuel efficiency. This X5 is about effortless power, a comfortable and upscale cabin, and the BMW brand. Fuel economy is usually secondary for these buyers.

City and highway performance

The EPA estimates are 18 MPG in the city and 25 MPG on the highway. The city figure reflects the stop-and-go driving common in urban commutes, where the X5’s weight and the engine needing to start and stop frequently impact fuel efficiency. The highway figure is better, showing the efficiency of the turbocharged 3.0L engine and eight-speed automatic transmission at steady cruising speeds. Even 25 MPG shows that this isn’t a dedicated fuel-sipping vehicle for long trips.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2017 BMW X5 sDrive35i is $2,750. This is based on driving 15,000 miles per year and the national average fuel price when calculated. Changing fuel prices can significantly alter this number. Drivers covering more or fewer miles annually will also see a directly proportionate change in their annual fuel expenditure.

Real-world expectations

While the EPA provides a standardized measure, real-world MPG can vary based on driving style, traffic, and vehicle maintenance. Aggressive acceleration, frequent hard braking, and extended idling all lower fuel economy. Mountainous terrain and consistently high speeds on the highway will also reduce efficiency compared to EPA estimates. Owners on fuel tracking websites often report figures in the 19-23 MPG range for combined driving, which is a reasonable expectation. However, expect a significant drop below 18 MPG in consistently heavy city traffic.

How it compares

Compared to competitors, the 2017 X5 sDrive35i is in the middle. For example, the 2017 Acura MDX with front-wheel drive achieves a combined 22 MPG, offering slightly better fuel economy. The supercharged V6 in the Audi Q7 gets 21 MPG combined, matching the X5, but offering all-wheel drive as standard equipment. The Mercedes-Benz GLE350 has similar numbers. For buyers prioritizing fuel efficiency, these small differences could matter. However, the X5 is often better in driving dynamics and handling, leading some buyers to accept a slightly less efficient SUV.

Tips to maximize efficiency

Consistent gentle acceleration is key. The inline-six is responsive, and there’s no need to aggressively push the gas pedal to get up to speed. Anticipate traffic flow and avoid sudden braking, letting the vehicle coast when you can. This reduces the engine workload and saves fuel.

Make sure tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check the recommended tire pressure (on the driver’s side door jamb) and keep it there regularly. This simple task measurably improves MPG.

Minimize idling. Modern engines don’t need long warm-up periods. Excessive idling wastes fuel and causes unnecessary emissions. If you’ll be stationary for more than a minute, it’s generally more fuel-efficient to turn off the engine.

Use cruise control on the highway. Maintaining a consistent speed minimizes changes in engine load, leading to better fuel efficiency. Cruise control also helps prevent accidental speeding, further enhancing fuel economy on longer trips. The X5’s comfortable ride and adaptive cruise control (if included) makes it easier to maintain ideal speeds.

Consider using the “Eco Pro” driving mode, if the vehicle has it. This economy program adjusts the engine mapping, throttle response, and transmission shift points to prioritize fuel efficiency. While it may slightly reduce performance, it can improve MPG, especially during highway driving. Explore X5 MPG across all years. You can also view all Bmw fuel economy data.