24 MPG combined is not the biggest reason someone buys a 2019 BMW 540i with the 3.0L inline-six. This is a precision driving instrument first, a luxury sedan second, and a reasonably efficient vehicle lower on the list. The 540i buyer wants a responsive engine, a finely tuned chassis, and the overall BMW driving experience. Fuel economy is considered, of course, but it’s one of many factors weighed by someone wanting a comfortable yet engaging sedan that still boasts a sub-five-second 0-60 mph time.

City and highway performance

The EPA estimates of 21 MPG in the city and 29 MPG on the highway reflect the 540i’s dual nature: eager performance combined with the ability to cruise long distances. The city figure shows that stop-and-go driving will reduce fuel economy, as expected with a turbocharged engine that encourages spirited acceleration. The highway number, while decent, reflects the car’s weight and the fact that it’s not optimized for pure efficiency.

The eight-speed automatic transmission of the 540i (S8) is programmed for both rapid shifts during aggressive driving and relatively tall gearing for relaxed highway cruising, helping to keep engine speeds down and enhance economy when eating up the miles. Still, it’s a performance-oriented transmission, and those quick shifts come at the expense of ultimate fuel savings.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,400 for the 2019 BMW 540i. This figure is calculated based on driving 15,000 miles per year, using a national average fuel price. Individual fuel costs could be higher or lower based on driving habits, location, and the fluctuating price of gasoline. And, the 540i’s engine requires premium fuel, adding to the cost at the pump. The $2,400 figure is likely a manageable expense for most 540i owners, particularly when considering the overall cost of ownership for a luxury vehicle, including maintenance and insurance.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy can vary significantly. Drivers who accelerate quickly and often may see figures closer to the city rating, or even below. Conversely, those who want better fuel efficiency and adopt a more conservative driving style on the highway may exceed the EPA’s 29 MPG estimate.

Expect a range of 20-30 MPG depending on driving conditions and habits. The type of driving, like the number of cold starts, level of congestion, and duration of average trip, all come into play. To see how these figures compare, view 540I MPG across all years.

How it compares

The 2019 BMW 540i is in a competitive segment with a variety of rivals. The Mercedes-Benz E450, with its 3.0L turbocharged V6, delivers similar performance but often shows slightly lower real-world MPG, typically around 20-27 MPG. The Audi A6 3.0T, with its supercharged V6, offers similar levels of performance and efficiency, often achieving a combined MPG figure close to the 540i.

Against these competitors, the 540i’s fuel consumption is comparable, with differences often coming down to specific driving habits and conditions. The Lexus GS 350, prioritizes a smooth and linear V6 with a combined 23 MPG, however, it lacks the BMW’s turbocharged punch. Midsize luxury buyers often cross-shop extensively, weighing performance, features, and running costs.

Tips to maximize efficiency

Optimize your tire pressures to the recommended levels. Underinflated tires increase rolling resistance, consuming more fuel. A simple pressure check every couple of weeks can make a noticeable difference with the 540i and contribute to better performance as well.

Use the BMW’s “Eco Pro” driving mode when possible. This mode adjusts throttle response and shift patterns to prioritize fuel efficiency. While it does reduce performance, it’s suitable for highway cruising or low-speed city driving when maximum power is not needed.

Avoid aggressive acceleration and braking. The 540i’s turbocharged engine is responsive and enjoyable to use, but frequent bursts of acceleration will significantly reduce fuel economy. Smooth, gradual acceleration will not only save fuel but also make for a more relaxing driving experience. Anticipating traffic will help you avoid sudden braking too.

Minimize idling. Modern engines, including the 540i’s inline-six, consume fuel even when stationary. If you’re stopped for more than a minute, turn off the engine to conserve fuel. Restarting the car uses less fuel than idling for extended periods. This applies to all all Bmw fuel economy data, not just the 540i.