19 MPG combined. That figure might raise eyebrows, but it’s crucial to understand what the 2018 BMW M550i xDrive is: a sledgehammer disguised in a Savile Row suit. It’s a potent performance sedan with a twin-turbocharged V8 sending power to all four wheels. Fuel economy is clearly not the main concern for the buyer who chooses this car. They prioritize blistering acceleration, confident handling, and a dose of understated luxury over squeezing every last mile from a gallon of premium fuel. The M550i buyer wants a luxury experience with an extra edge.

city and highway performance

The EPA estimates suggest 16 MPG in the city and 25 MPG on the highway, numbers that reflect the M550i’s dual personality. The city figure indicates the engine’s thirst when subjected to frequent stop-and-go driving. The eight-speed automatic transmission, however, makes efficient use of the engine’s strong power, and clever engineering mitigates the consequences of having a large-displacement engine. On the open road, at a steady cruise, 25 MPG is a realistic expectation, especially with judicious use of the throttle. Keep in mind that exploiting the engine’s power will cause that figure to plummet.

annual fuel cost

Owning and operating a high-performance sedan comes with certain financial implications. The EPA estimates the annual fuel cost for the 2018 BMW M550i xDrive at $3,050. This figure is calculated based on driving 15,000 miles per year and using the national average fuel price for premium gasoline. While individual driving habits and local fuel prices will affect this, it offers a reasonable benchmark for the financial commitment involved in running this kind of vehicle.

real-world expectations

While EPA estimates provide a standardized benchmark, your actual MPG will vary based on driving style and conditions. The M550i’s performance begs to be explored, and frequent bursts of acceleration and aggressive driving will significantly reduce your fuel economy. Conversely, a relaxed driving style with minimal hard acceleration can help you get closer to the EPA figures. Terrain also plays a part. Hilly areas will naturally require more throttle input, lowering MPG. Many owners online report figures slightly below the EPA estimates, though those who prioritize efficiency have seen numbers equal to or sometimes exceeding the highway rating.

how it compares

The M550i xDrive exists in a competitive segment, with many rivals offering a similar blend of performance and luxury. For example, the 2018 Mercedes-AMG E43 sedan, with its turbocharged V6, delivers a slightly better combined MPG of 22, but offers a different character of performance. The 2018 Audi S6, equipped with a turbocharged V6, achieves a similar 21 MPG combined. These models represent alternatives for buyers who might be seeking a similar experience with somewhat improved fuel efficiency, but at the cost of overall power. Buyers should also consider M550I MPG across all years from this model range. Ultimately, understanding all Bmw fuel economy data is key, and these comparisons highlight the trade-offs inherent in choosing a high-performance sedan. The M550i’s buyer is generally willing to accept its lower fuel economy relative to the competition in exchange for its larger engine and more muscular performance.

tips to maximize efficiency

The tempting V8 under the hood is a major attraction, but there are ways to minimize its thirst. Ease into acceleration and avoid sudden bursts of speed whenever possible. Gradual acceleration not only saves fuel but also contributes to a smoother driving experience. Predictive driving, anticipating traffic flow and avoiding unnecessary braking, allows the vehicle to maintain momentum, improving overall efficiency.

Engage the BMW’s Eco Pro driving mode, if equipped. This mode adjusts various vehicle settings to prioritize fuel efficiency, including throttle response and shift patterns. While it might slightly diminish the car’s performance feel, it can make a noticeable difference on longer journeys when high performance is not needed. Be aware that driving in Eco Pro can sometimes feel unnatural, so be sure it’s a good fit for your driving style.

Ensure that the M550i’s tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressures regularly, especially before long trips, to maintain optimal efficiency and handling. Refer to the sticker located on the driver’s side doorjamb for the correct tire pressure specifications.

Minimize aerodynamic drag by removing any unnecessary roof racks or cargo carriers when not in use. These accessories can significantly increase wind resistance, reducing fuel economy, especially at highway speeds. A clean roofline contributes to a smoother airflow, helping to maximize your MPG.