23 MPG combined is a figure most 740i xDrive owners likely see only when glancing at the window sticker before signing. This isn’t a Prius; it’s a long-wheelbase German luxury sedan with strong acceleration, all-wheel drive, and a cabin crafted to coddle its occupants in unparalleled comfort. Fuel economy is understandably a secondary concern for the buyer who prioritizes performance and prestige over saving money.

City and highway performance

The EPA estimates the 2018 BMW 740i xDrive at 20 MPG in the city and 29 MPG on the highway. This difference reflects the turbocharged 3.0L inline-six engine. Around town, stop-and-go traffic taxes any engine, and the 740i’s weight doesn’t help. However, on the open road, the long gearing of the eight-speed automatic transmission, combined with the engine’s relaxed demeanor at cruising speeds, allows for relatively efficient travel. Expect the highway figure to diminish considerably should you frequently use the engine’s passing power.

Annual fuel cost

The EPA says that the annual fuel cost for the 2018 BMW 740i xDrive is $2,500. This figure is based on driving 15,000 miles per year and using the national average fuel price. Your actual fuel expenses will vary depending on your driving habits, the type of fuel you use, and local fuel prices that can change during the year.

Real-world expectations

Hitting the EPA numbers is possible under ideal conditions, but real-world driving often yields slightly lower figures. Owners report averages ranging from 18-22 MPG in mixed driving conditions. Aggressive acceleration, frequent short trips, and extended idling will all negatively impact fuel economy.

Those who prioritize smooth acceleration and consistent highway speeds can likely approach, or even exceed, the EPA’s highway estimate.

How it compares

Compared to its competitors, the 2018 BMW 740i xDrive is in a competitive position. The Mercedes-Benz S450 4MATIC, with its turbocharged 3.0L V6, delivers a similar 19 MPG city and 28 MPG highway. The Audi A8 3.0T quattro, with its supercharged 3.0L V6, offers nearly identical fuel economy figures. The Lexus LS 500 AWD, with its turbocharged 3.5L V6, manages a slightly lower 18 MPG city and 27 MPG highway. The differences are small, suggesting a similar level of overall efficiency. For buyers considering all Bmw fuel economy data, the 740i occupies a sweet spot between performance and efficiency within the brand’s lineup. The 740I MPG across all years remains generally consistent for this generation of vehicle.

Tips to maximize efficiency

Use the BMW’s driving mode selector. Eco Pro mode optimizes the engine and transmission for maximum fuel efficiency even if it reduces performance. It may be relaxing on long highway drives, so try it.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly and inflate them to the recommended levels, typically found on a sticker inside the driver’s side doorjamb or in the owner’s manual.

Avoid aggressive driving. Rapid acceleration and hard braking consume more fuel than smooth inputs. Anticipate traffic flow and maintain a steady pace. The BMW’s chassis is optimized for smooth driving, so allow it to work as intended.

Minimize idling. If you anticipate idling for more than a minute or two, turn off the engine. Modern engines restart quickly and efficiently, and restarting consumes less fuel than prolonged idling. This is especially true on a cold start, so planning trips ahead can reduce idling.