17 MPG combined. That’s the headline figure for the 2018 BMW X5 xDrive50i equipped with its 4.4L V8. Let’s be honest: this isn’t a number that will win any fuel-sipping awards, but it’s also not for drivers solely focused on efficiency. This X5 exists for those who prioritize performance and luxury over economy, people who crave the immediate punch of a twin-turbocharged V8 and the prestige that comes with the BMW badge. This version of the X5 satisfies a desire for effortless power and a refined driving experience, and its buyers understand what they’re sacrificing at the pump to achieve it.

City and highway performance

The EPA ratings for this X5 break down to 15 MPG in the city and 21 MPG on the highway. The city figure reflects the reality of stop-and-go traffic, where the engine’s considerable displacement and turbocharging require fuel to get the X5’s substantial weight moving repeatedly. The highway number, while better, still trails many competitors. Expect 21 MPG only when maintaining a steady speed; aggressive passing or uphill climbs will drag that number down quickly. This X5 is at its least efficient in urban environments and benefits noticeably from consistent highway cruising, though it will never be mistaken for a hybrid on longer trips.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 BMW X5 xDrive50i at $3,400. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, using the national average fuel price. It’s a significant outlay and a critical consideration for potential buyers. Some may find this cost acceptable given the vehicle’s performance and luxury, but others may experience sticker shock. This annual cost is a direct reflection of the X5’s powerful engine and performance-oriented design, and it will likely be substantially higher for drivers with aggressive habits or those who spend a disproportionate amount of time in heavy traffic.

Real-world expectations

While the EPA provides a benchmark, real-world fuel economy often varies. Drivers with a heavy foot will likely see numbers below the EPA estimates, especially in city driving. On the other hand, those who prioritize smooth acceleration and anticipate traffic can potentially achieve figures closer to, or even slightly above, the highway rating on long trips. Factors such as tire pressure, proper maintenance, and the use of the recommended fuel grade also play a role. Expect a range, and remember that the X5’s prodigious power is always tempting to unleash, with corresponding consequences for your fuel bill. Keep an eye on X5 MPG across all years to understand how this model compares to others.

How it compares

Compared to other SUVs in its class, the 2018 BMW X5 xDrive50i lags behind in fuel efficiency. The Acura MDX, for example, achieves 22 MPG combined with its V6 engine. Even the supercharged V6-powered Land Rover Range Rover Sport manages a slightly better 18 MPG combined. The Mercedes-Benz GLE 43 AMG, another performance-oriented SUV, also sits around 18 MPG combined. This comparison highlights the X5’s relative inefficiency. Buyers often choose the X5 xDrive50i for its specific blend of BMW driving dynamics and V8 power, accepting the fuel economy penalty for the performance they desire. These buyers might also consider all Bmw fuel economy data, across different models.

Tips to maximize efficiency

Take advantage of the X5’s driving modes. Selecting “Eco Pro” mode can noticeably improve fuel economy by adjusting throttle response, shift points, and climate control settings. It might slightly reduce the immediate responsiveness of the engine, but it’s a worthwhile trade-off for daily commuting or highway cruising where maximum performance isn’t required.

Gentle acceleration and anticipating traffic are key. Avoid abrupt starts and stops, which consume significantly more fuel. Instead, gradually increase speed and maintain a steady pace whenever possible. Look far ahead down the road and anticipate traffic flow to minimize unnecessary braking and acceleration.

Ensure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly, especially during temperature changes, and adjust as needed to maintain optimal efficiency.

Minimize aerodynamic drag. Remove roof racks or cargo carriers when not in use, as they can significantly increase wind resistance and reduce fuel economy. Even small changes to the vehicle’s aerodynamics can have a noticeable impact on fuel consumption, particularly at higher speeds.

Regular maintenance is crucial. Keeping your X5 properly maintained, including regular oil changes, air filter replacements, and spark plug inspections, ensures the engine is running at peak efficiency. A well-maintained engine delivers optimal performance and fuel economy.