25 MPG combined is not the main reason someone buys a 2020 BMW 540i xDrive. This is a luxury performance sedan with all-wheel drive, designed to deliver a supremely smooth and engaging driving experience. Fuel economy needs to be acceptable, but it’s secondary to power, refinement, and technology. The 540i appeals to drivers who appreciate a well-engineered machine, and while they’re not looking to bleed money at the pump, they’re also not prioritizing hyper-efficiency. They’re seeking a balance, and the 540i’s mileage reflects that.

City and highway performance

The EPA estimates the 2020 BMW 540i xDrive at 22 MPG in the city and 29 MPG on the highway. That spread is fairly typical for a vehicle of this type. The city figure reflects the stop-and-go driving conditions that take a toll on fuel efficiency, especially with the 3.0L 6-cylinder engine’s considerable power. The highway figure is more promising, showcasing the benefits of the smooth-shifting eight-speed automatic transmission, which keeps the engine operating in its most efficient range at cruising speeds. The xDrive all-wheel-drive system does add a bit to the vehicle’s weight and drivetrain friction, likely impacting fuel economy slightly compared to a rear-wheel-drive 540i.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2020 BMW 540i xDrive is $2,300. This figure is based on driving 15,000 miles per year and using national average fuel prices. It is just an estimate, of course. Your actual fuel costs may be higher or lower depending on your driving habits, the type of fuel you use, and fluctuations in gas prices. The annual fuel cost provides a useful benchmark for comparing the 540i’s fuel consumption to other vehicles in its class.

Real-world expectations

While the EPA estimates provide a standardized benchmark, real-world fuel economy often differs. Aggressive driving, frequent short trips, and extended idling can all significantly reduce MPG. Owners who prioritize smooth acceleration, anticipate traffic, and maintain consistent speeds are more likely to achieve figures closer to the EPA estimates. The weather, tire inflation, and the use of accessories such as air conditioning can also impact fuel efficiency. Understanding these factors allows drivers to manage their driving style and car maintenance to optimize fuel consumption.

How it compares

In the competitive mid-size luxury sedan segment, the 2020 BMW 540i xDrive’s fuel economy is generally competitive. The Mercedes-Benz E450 4Matic, with its 3.0L inline-6 turbo engine, achieves a similar 23 MPG combined. The Audi A6 55 TFSI Quattro, with its 3.0L V6, also lands in a similar range, offering 25 MPG combined. It stands out from the smaller engine variants like the BMW 530i that ekes out 27 MPG combined but does not provide the same power and smooth acceleration that some drivers covet. For those looking to move toward more fuel efficient vehicles, all Bmw fuel economy data can be perused. For more details on the 540I MPG across all years, there are extensive resources available on these models.

Tips to maximize efficiency

The 2020 BMW 540i xDrive benefits from BMW’s Driving Dynamics Control system, which includes an “Eco Pro” mode. Engaging this mode adjusts throttle response, transmission mapping, and climate control settings to prioritize fuel efficiency. While it might slightly dampen the car’s performance, it can noticeably improve MPG, especially during highway cruising.

Given the 540i’s turbocharged engine, using premium fuel as recommended is critical for optimal performance and efficiency. While it might be tempting to save money by using regular fuel, the engine’s computer will retard timing to prevent knocking, reducing power and potentially increasing fuel consumption. Always adhere to the manufacturer’s recommendations.

Regular maintenance, particularly tire inflation and oil changes, is essential for maintaining optimal fuel efficiency. Underinflated tires create more rolling resistance, demanding more energy from the engine. Similarly, old or low-quality engine oil can increase friction, impacting fuel consumption. Stick to the recommended service intervals and use the specified lubricants.

Avoid unnecessary idling. Modern engines are designed to be efficient when running consistently, so prolonged idling wastes fuel. If you anticipate being stopped for more than a minute or two, it’s generally more fuel-efficient to turn off the engine. This is very useful when the 540i Xdrive is doing city driving.