16 MPG combined requires immediate context when discussing the 2017 BMW X5 M. This isn’t a vehicle purchased for lower fuel costs or budget-conscious operation. It’s a near-600 horsepower performance SUV, a wolf in sheep’s clothing, and that MPG reflects the price to be paid for ballistic acceleration and track-inspired handling in a high-riding package. The X5 M buyer prioritizes driving thrills and exclusivity above all else, accepting the fuel bill as a necessary cost of entry.

City and highway performance

The EPA estimates of 14 MPG in the city and 19 MPG on the highway accurately reflect the X5 M’s consumption characteristics. The city figure highlights the realities of stop-and-go traffic with a large displacement, turbocharged engine. The 4.4L V8 needs a steady diet of premium fuel to feed its appetite when repeatedly accelerating from a standstill. While the 19 MPG highway figure is achievable during steady-state cruising, it’s tempting to exploit the engine’s prodigious power for overtaking, which will quickly drop the mileage. This split personality, docile cruiser versus ferocious performer, is central to the X5 M’s appeal, and the fuel economy numbers are simply part of the deal.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2017 BMW X5 M will be $3,600. This calculation is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. While individual driving habits and fluctuating fuel costs will undoubtedly affect the actual expense, $3,600 provides a realistic baseline. Someone covering significantly more miles, or with a heavier foot on the accelerator, should expect a noticeably higher annual fuel bill. This number will surely be weighed against the utility and performance that this model brings.

Real-world expectations

While EPA estimates provide a useful benchmark, real-world fuel economy for the X5 M can vary widely depending on driving style and conditions. Owners who frequently engage the Sport or Sport+ driving modes, or who regularly use the launch control feature, will likely see figures significantly below the EPA estimates. Conversely, those who prioritize smooth acceleration and consistent highway speeds might achieve closer to the advertised numbers. It’s safe to say that most X5 M owners are not hypermilers, and the joy of exploiting the engine’s incredible performance often outweighs the desire for optimal fuel efficiency. Browsing owner forums will reveal a wide range of reported figures, but expect averages in the low-to-mid teens in mixed driving situations.

How it compares

The 2017 BMW X5 M doesn’t have many direct competitors, but those seeking similar performance and features often cross-shop it against other high-performance SUVs. The Mercedes-AMG GLE 63 S Coupe, for example, offers similar levels of power and prestige, but manages only 15 MPG combined. Even the Porsche Cayenne Turbo, known for its blend of performance and somewhat better efficiency, achieves just 17 MPG combined. If fuel economy is a primary concern, someone in the market for an X5 may cross-shop with the more economical X5 sDrive35i which gets 21 MPG combined. For all Bmw fuel economy data, the X5 M sits near the bottom. Comparing the X5 MPG across all years shows the X5 M consistently delivers worse mileage than other X5 trims.

Tips to maximize efficiency

While fuel economy might not be the primary concern for X5 M owners, there are still ways to lessen the impact on your wallet. Avoid aggressive acceleration and heavy braking, as these actions put significant strain on the engine and consume excess fuel. Using the Eco Pro driving mode, although it may dampen the car’s responsiveness, can encourage more efficient driving habits by optimizing throttle response and shift patterns.

Ensure your tires are properly inflated to the recommended pressure, as underinflated tires increase rolling resistance and reduce fuel economy. This is particularly important on a heavy vehicle like the X5 M. Also, ensure that you’re using the correct grade of fuel. The X5 M’s high-performance engine demands premium gasoline. Using lower octane fuel could diminish performance and potentially damage the engine over time.

Minimize idling whenever possible. Letting the engine run while stationary consumes fuel without covering any distance at all. On cooler days, once the engine is warmed, it’s best to shut down if you know you’ll be stopped for awhile. Similarly, while tempting, avoiding unnecessary top speed runs will help keep fuel economy at acceptable levels.

Keep up with scheduled maintenance, including regular oil changes and air filter replacements. A well-maintained engine operates more efficiently and consumes less fuel. Consider that your tires can affect mileage as well. When it is time to replace them, choose a low-resistance tire option from a reputable brand to minimize rolling resistance.