26 MPG combined won’t win any fuel economy awards, but it’s a reasonable compromise in the 2021 BMW 540i xDrive for buyers who prioritize a smooth inline-six engine, all-wheel drive, and executive-class luxury over ultimate frugality. This car is for the driver who appreciates German engineering and spirited performance, someone likely to occasionally enjoy the engine’s ample power, and understands that this comes at a cost at the pump.

City and highway performance

The EPA estimates for the 2021 BMW 540i xDrive are 23 MPG in the city and 31 MPG on the highway. The city number reflects the stop-and-go reality of urban commutes, where the engine’s start/stop system plays a crucial role in saving fuel. Aggressive acceleration from traffic lights will quickly negate any potential savings. On the open road, the 31 MPG figure is more attainable, especially when using cruise control and maintaining a consistent speed. The eight-speed automatic transmission (S8) is key here, keeping the engine in its optimal RPM range and contributing to efficient highway travel. Even on the highway, using the engine’s power for passing will impact your fuel consumption.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 BMW 540i xDrive at $2,250. This figure is based on driving 15,000 miles per year, with roughly 55% of those miles driven in the city and 45% on the highway. The calculation also uses the national average fuel price. This is just an estimate. Your actual fuel cost will vary depending on your driving habits, the type of fuel you use, and gas prices in your area. Premium fuel is recommended for the 540i xDrive, which will increase your annual fuel expenses beyond this EPA estimate.

Real-world expectations

While the EPA figures provide a useful baseline, real-world fuel economy for the 2021 BMW 540i xDrive can vary. Drivers who accelerate quickly and drive aggressively will likely see figures closer to the low end of the EPA range, or even below. However, those who prioritize fuel efficiency, drive primarily on the highway, and use eco-driving techniques can often meet or even exceed the EPA estimates. Factors such as traffic, weather, and the use of accessories like air conditioning can also influence fuel consumption. Checking out 540I MPG across all years will give you a broader understanding of what owners have reported about this car’s efficiency across multiple model years. Realistic expectations and mindful driving habits are key to achieving the best possible fuel economy.

How it compares

The 2021 BMW 540i xDrive’s fuel economy is competitive within the mid-size luxury sedan segment. The Mercedes-Benz E450 4MATIC, with its turbocharged inline-six, boasts a similar 26 MPG combined. Audi’s A6 55 TFSI, equipped with a turbocharged V6, comes in slightly lower at 25 MPG combined. The Genesis G80 3.5T AWD, packing a twin-turbo V6, lands quite a bit lower at just 20 MPG combined. There are more fuel-efficient options, including hybrid and electric vehicles, but these often compromise performance and driving experience. The 540i xDrive strikes a balance for drivers who want both luxury and power, but are still mindful of fuel costs. For a broader view, take a look at all Bmw fuel economy data.

Tips to maximize efficiency

Use the 540i xDrive’s driving mode selector. Selecting “Eco Pro” mode softens throttle response, adjusts the transmission shift points, and optimizes other vehicle systems for maximum fuel efficiency. This mode might slightly diminish the car’s engaging driving dynamics, but it can noticeably improve your MPG, particularly during city driving.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended levels, which can be found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Avoid excessive idling. Modern engines are designed to be fuel-efficient, and idling wastes gas. If you’re stopped for more than a minute or two, it’s generally more efficient to turn off the engine and restart it when you’re ready to go. In traffic, the car’s auto-start/stop will manage this.

Practice smooth and consistent driving habits. Avoid abrupt acceleration and hard braking, as these actions consume significantly more fuel. Anticipate traffic flow and maintain a steady speed whenever possible. Using cruise control on the highway can help you maintain a consistent speed and optimize fuel economy.

Lighten your load. Carrying unnecessary weight in your vehicle reduces fuel efficiency. Remove any items from your trunk or cargo area that you don’t need, as every extra pound adds to fuel consumption. Reducing weight is a free and simple way to improve your MPG.