The 2020 BMW X5 xDrive50i gets 18 MPG combined. That number might be unacceptable in a smaller crossover, but the X5 xDrive50i isn’t small. It’s a statement, a meticulously engineered and lavishly appointed luxury SUV powered by a ferocious twin-turbo V8 engine. Its owners likely aren’t driven by fuel efficiency, but by rapid acceleration, all-weather security, and the BMW badge. They accept a trade-off at the pump.

City and highway performance

The EPA estimates 16 MPG in the city and 22 MPG on the highway for the 2020 X5 xDrive50i. The city figure reflects stop-and-go traffic, where the V8’s strong output is essentially wasted as it repeatedly spools up and slows down. The highway figure, while better, still trails many competitors. The X5’s weight, all-wheel-drive system, and aerodynamic profile require considerable energy to maintain speed at freeway velocities, even with the engine at low RPM.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 BMW X5 xDrive50i at $3,200. This is based on driving 15,000 miles per year and assumes a national average fuel price. Premium fuel is recommended for optimal performance, which affects real-world costs. The $3,200 figure allows comparison of the X5 xDrive50i’s running costs to other vehicles.

Real-world expectations

While the EPA provides a benchmark, expect real-world MPG to vary based on driving style and conditions. Frequent hard acceleration, towing, or consistently driving in mountainous terrain will push fuel consumption higher. A driver with a lighter foot who spends more time on the highway could approach or even slightly exceed the EPA’s highway estimate.

Consistently achieving the combined 18 MPG will require conscious effort, however. The V8’s power is hard to resist, and tapping into it reduces fuel economy. If fuel economy is a primary concern, buyers should consider one of the X5’s less potent powertrain options; X5 MPG across all years shows the potential improvements.

How it compares

The 2020 BMW X5 xDrive50i is thirsty compared to rivals. A similarly equipped Mercedes-Benz GLE 450 4MATIC, with its inline-six and mild-hybrid system, achieves around 21 MPG combined. The Porsche Cayenne S, with its twin-turbo V6, also offers slightly better fuel economy, hovering around 19 MPG combined. Even the supercharged Range Rover Sport, despite its similar power output and weight, manages a marginally better 19 MPG combined. These comparisons show the priority for power and performance in the X5 xDrive50i, impacting its fuel consumption. Buyers comparing other BMW models should consult all Bmw fuel economy data.

Tips to maximize efficiency

Use the adaptive drive modes. Select “Eco Pro” mode to remap the throttle response, shift points, and climate control settings to prioritize fuel conservation. It may diminish the X5’s responsiveness, but it can noticeably improve MPG, especially in city driving. Regularly engage cruise control on the highway to maintain a constant speed. Minimizing speed fluctuations is one of the easiest ways to optimize fuel efficiency on long journeys. Avoid aggressive acceleration and hard braking. The X5 xDrive50i’s powerful engine makes it tempting to exploit its full potential, but doing so dramatically reduces fuel economy. Smooth, gradual acceleration and anticipation of traffic conditions will yield the best results.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressures regularly and maintain them at the recommended levels specified on the doorjamb sticker. Shed excess weight. Carrying unnecessary cargo in the X5 adds weight and decreases fuel efficiency. Remove any extraneous items from the vehicle to minimize the load on the engine.