25 MPG combined is not the main reason someone buys a 2020 BMW 540i. This mid-size luxury sedan prioritizes performance and driving experience first. While someone choosing a hybrid explicitly wants maximum efficiency, the 540i buyer wants a blend of reasonable economy and effortless power from its turbocharged six-cylinder engine. They accept the fuel costs as a necessary part of enjoying the car’s other attributes.

City and highway performance

The EPA estimates 22 MPG in the city and 30 MPG on the highway. These figures are realistically achievable for most drivers in typical conditions. The 30 MPG highway figure is what most owners will see on long trips, and it’s the effectiveness of the 540i’s aerodynamic design and efficient eight-speed automatic transmission. In stop-and-go city driving, expect the numbers to dip closer to the EPA estimate, and even lower with a heavy foot. The transmission plays an important role here, offering smooth and responsive shifts that help optimize fuel consumption without sacrificing performance.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 BMW 540i at $2,300. This figure assumes 15,000 miles of driving per year, with a blend of city and highway miles, using the national average fuel price. Keep in mind that premium fuel is recommended for the 540i’s engine to deliver optimal performance. Fluctuations in gasoline prices can meaningfully change this annual cost, so it’s important to consider that when budgeting for ownership. A driver who covers far more than 15,000 miles annually, or one that exclusively drives in the city, will see significantly higher fuel costs.

Real-world expectations

While the EPA provides a standardized test, real-world fuel economy depends heavily on driving style, traffic conditions, and climate. Aggressive acceleration, frequent hard braking, and extended idling will all negatively impact fuel efficiency. Conversely, smooth acceleration, maintaining a steady speed on the highway, and anticipating traffic flow can help drivers come closer to, or even exceed, the EPA estimates. Owners report seeing slightly better than the combined 25 MPG, especially on longer highway drives. See 540I MPG across all years to get a sense of the range others have experienced.

How it compares

Compared to its competitors, the 2020 BMW 540i’s fuel economy is generally competitive within its class. The Mercedes-Benz E450, with its 3.0L turbocharged inline-six, achieves similar figures in the mid-20s combined. The Audi A6 3.0T, offering comparable performance, also lands in the same ballpark, around 24 MPG combined. By comparison, the Lexus GS 350, with its naturally aspirated V6, delivers slightly worse fuel economy, often struggling to reach 24 MPG combined. The Volvo S90 T6, with its turbocharged and supercharged four-cylinder engine, achieves slightly better combined numbers, hovering around 26 MPG. For owners seeking to minimize fuel costs, these differences highlight alternatives. For some owners fuel economy isn’t as important as other factors that may be important to them.

Tips to maximize efficiency

The 540i features different driving modes, Eco Pro, Comfort, and Sport, to tailor the driving experience. Engaging Eco Pro mode optimizes various vehicle settings, such as throttle response and transmission behavior, to prioritize fuel efficiency. Comfort mode offers a balanced approach, while Sport mode prioritizes performance, noticeably reducing fuel economy. Using Eco Pro mode when possible can yield a tangible improvement in MPG, especially in city driving.

Regular maintenance ensures that the engine is running at peak efficiency. Proper tire inflation, timely oil changes, and replacing air filters as recommended by BMW are important for maintaining optimal fuel economy. Neglecting these maintenance items can lead to increased fuel consumption and reduced performance.

Avoid unnecessary idling. Modern engines, like the one in the 540i, consume fuel even when stationary. If you anticipate being stopped for more than a minute, it’s generally more fuel-efficient to turn off the engine. Many 540i models are equipped with auto start-stop, which automatically shuts off the engine at traffic lights to save fuel, but on hot days where you want to use the AC, this might be worth defeating.

Practice smooth driving techniques. Avoid aggressive acceleration and hard braking. Anticipate traffic flow and maintain a steady speed when possible. The 540i’s smooth power delivery makes it easy to maintain momentum without excessive throttle inputs, contributing to improved fuel efficiency. Consider your driving habits to get better fuel efficiency.

Consider tire selection when replacement time comes. Low rolling resistance tires are designed to reduce friction and improve fuel economy. While they might not offer the same level of grip as performance tires, they can contribute to a noticeable improvement in MPG, especially on longer journeys. If maximizing efficiency is a high priority, explore low rolling resistance tire options compatible with the 540i’s wheel size and performance requirements. Owners can explore all Bmw fuel economy data to better understand BMW’s overall fuel efficiency strategy.