25 MPG combined isn’t going to win any hypermiling competitions, but it’s a respectable figure for the 2021 BMW 740i. This isn’t a car bought for its fuel efficiency; it’s a statement of success, a rolling sanctuary of leather and technology. The buyers who choose the 740i prioritize a smooth ride, a luxurious interior, and effortless power, and they’re willing to accept a certain level of fuel consumption to get it. For this demographic, fuel economy is a consideration, but not a deciding factor.

City and highway performance

The EPA estimates the 2021 BMW 740i will achieve 22 MPG in the city and 29 MPG on the highway. The city figure reflects the stop-and-go nature of urban driving, which naturally takes a toll on fuel economy. The 29 MPG highway rating is more impressive, showcasing how efficient the 3.0L turbocharged inline-six engine is when cruising at constant speeds. The smooth-shifting 8-speed automatic transmission also contributes, keeping the engine in its optimal power band.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 BMW 740i at exactly $2,300. This figure is based on driving 15,000 miles per year and using national average fuel prices, which are constantly in flux. Understand that your actual fuel costs will vary depending on your driving habits, the type of fuel you purchase, and where you live, but this gives you a baseline to consider.

Real-world expectations

While the EPA numbers provide a standardized comparison point, real-world fuel economy often deviates. The 740i’s turbocharged engine and drivetrain can be sensitive to driving style. Aggressive acceleration and frequent hard braking will significantly reduce fuel economy, pulling numbers closer to the city figure, even outside of urban environments. Conversely, mindful driving, using features like cruise control on the highway and driving more conservatively in town, can help to get closer to the EPA estimate, or even slightly exceed it.

How it compares

The 740i competes in a rarefied segment. The Lexus LS 500, while supremely comfortable, only manages 21 MPG combined with its non-hybrid powertrain. The Mercedes-Benz S500, a direct competitor, achieves similar numbers at 24 MPG combined. The Audi A8 comes close at 23 MPG combined. These small differences might not sway a 740i buyer who is primarily looking for driving dynamics and brand cachet, but they do highlight that efficiency isn’t a clear differentiator in this class. Explore all all Bmw fuel economy data to see how the 740i fits within the BMW lineup.

Tips to maximize efficiency

Take advantage of the BMW’s driving modes. Selecting “Eco Pro” mode will remap the throttle response, adjust the shift points, and even reduce the energy consumption of auxiliary systems like the air conditioning. Remember that this car is designed for smooth, powerful operation, and altering driving habits will positively affect fuel economy.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check the tire pressure regularly and inflate them to the recommended levels listed on the doorjamb sticker.

Reduce unnecessary weight. Carrying extra weight in the trunk or back seat reduces fuel economy. Remove any items you don’t need to lighten the load and improve efficiency. This is particularly crucial on such a large sedan, where every pound counts.

Pay attention to maintenance. A well-maintained engine is an efficient engine. Follow the recommended maintenance schedule in the owner’s manual, including regular oil changes, air filter replacements, and tune-ups. Poorly maintained engines will always deliver inferior mileage results.

Consider how your typical trips affect fuel consumption. The 740i is most efficient on longer trips at consistent speeds. Frequent short trips with cold starts will significantly reduce overall fuel economy. If possible, consolidate errands into fewer trips to minimize inefficient operation. Consider whether a smaller, more fuel-efficient vehicle may be a better choice for these scenarios. Learn more about 740I MPG across all years if this is influencing your purchase.