25 MPG combined might not sound impressive, but for a focused, high-performance roadster like the 2022 BMW Z4 M40i, it’s an acceptable figure. Buyers of this vehicle aren’t prioritizing ultimate fuel efficiency; they’re seeking a thrilling driving experience, and the Z4 M40i delivers that with a powerful six-cylinder engine and sharp handling. Gas mileage takes a back seat to driving enjoyment for this particular demographic.

City and highway performance

The EPA estimates the Z4 M40i achieves 22 MPG in the city and 29 MPG on the highway. These figures reflect the engine’s tuning and the car’s overall design. In urban environments, the frequent stops and starts will naturally decrease fuel economy, while the open road allows the turbocharged inline-six to operate more efficiently, approaching the 29 MPG mark when cruising at steady speeds. Remember that these are EPA estimates, and individual driving habits will significantly impact the actual numbers achieved.

Annual fuel cost

According to the EPA estimates, owning a 2022 BMW Z4 M40i will cost you approximately $2,300 in fuel per year. This is based on driving 15,000 miles annually and using the national average fuel price at the time of calculation. Keep in mind that this is a general estimate. If you drive significantly more or less than 15,000 miles per year, or if fuel prices in your area are higher than the national average, your actual fuel costs will vary accordingly.

Real-world expectations

While the EPA estimates provide a useful benchmark, real-world fuel economy often differs. Expect to see numbers within a few MPG of the EPA ratings, depending on your driving style and conditions. Consistent aggressive acceleration or extended idling will certainly penalize your fuel economy. Similarly, driving primarily in congested city traffic will likely result in lower MPG than the official estimates. However, a relaxed highway cruise should yield numbers close to, or even slightly exceeding, the 29 MPG highway rating. Check our Z4 MPG across all years for owner reported estimates.

How it compares

Competitors to the Z4 M40i, like the Porsche 718 Boxster, offer similar, though often slightly better, fuel economy. A Porsche 718 Boxster S, with its 2.5L turbocharged engine, achieves a combined EPA rating of 22 MPG. This difference, while noticeable, isn’t likely to be a deciding factor for most buyers in this segment. The Jaguar F-TYPE P300, with its 2.0L turbocharged four-cylinder, manages a more respectable 25 MPG combined. Exploring all Bmw fuel economy data can provide additional context. Ultimately, buyers are weighing performance, features, and brand image more heavily than a few extra miles per gallon. The Mazda MX-5 Miata Grand Touring, while down on power compared to the Z4 M40i, boasts a combined 30 MPG, showcasing the efficiency difference when prioritizing weight reduction and a smaller engine.

Tips to maximize efficiency

Take advantage of the Z4 M40i’s driving modes. Selecting the “Eco Pro” mode will remap the throttle response and transmission shift points to prioritize fuel efficiency. While it might slightly dampen the responsiveness of the engine, it can make a tangible difference in fuel consumption during everyday driving.

Avoid unnecessary idling. When stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and excessive idling wastes fuel unnecessarily.

Maintain proper tire inflation. Under-inflated tires increase rolling resistance, which in turn reduces fuel economy. Check your tire pressures regularly – at least once a month – and inflate them to the recommended levels specified on the doorjamb sticker. This also enhances handling and extends tire life.

Smooth and consistent driving is key. Avoid aggressive acceleration and hard braking, as these actions consume more fuel. Anticipate traffic flow and maintain a steady speed whenever possible. The Z4 M40i’s excellent brakes are best used sparingly, not as a regular driving habit.

Consider using premium fuel. The Z4 M40i’s high-performance engine is designed to run optimally on premium fuel. While it might operate on regular fuel, using the recommended premium grade will maximize its performance and efficiency.