19 MPG combined won’t win any fuel efficiency awards, but it’s also entirely beside the point for the 2020 BMW M4 Convertible Competition. This isn’t a car purchased for its frugality; it’s a statement, a visceral experience, and a performance machine draped in a stylish convertible package. The buyer of this M4 isn’t agonizing over nickels and dimes at the gas pump; they’re buying a very specific kind of thrill, and they understand the trade-offs involved.

City and highway performance

The M4 Convertible Competition earns its 16 MPG city and 22 MPG highway EPA ratings thanks to its potent 3.0L inline-six engine and seven-speed automatic transmission (AM-S7). Stop-and-go traffic absolutely punishes fuel economy in a high-performance vehicle. The M4’s turbochargers spool and then sit idle, and the engine consumes fuel while idling. On the open road, however, the M4 can stretch its legs, but even then, resisting the temptation to dip into the considerable power on tap is a constant battle against the car’s very nature. Anyone choosing the M4 Convertible isn’t prioritizing fuel efficiency; instead, they crave that distinctive inline-six snarl and the acceleration that pins you to the seat.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 BMW M4 Convertible Competition at $3,050. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. Keep in mind that this is just an estimate; your actual fuel costs will vary depending on your driving habits, the type of fuel you use (premium is recommended for optimal performance), and local fuel prices. The $3,050 figure, while substantial, likely isn’t a deterrent for the target demographic, considering the overall cost of ownership and the sheer joy this car delivers on a sunny day with the top down.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy is highly dependent on driving style. Drive the M4 Convertible Competition gently, and you might approach the 22 MPG highway rating, possibly even exceeding it slightly on a long, flat road while using cruise control. However, exploiting the car’s performance potential, dipping into the throttle to fully experience the car’s acceleration, engaging Sport or Sport+ driving modes, and spending time on winding roads, will push fuel economy considerably lower. Owners who frequently drive in demanding conditions or who like to push the car hard should expect to see real-world numbers closer to the city rating, or even lower.

How it compares

Compared to other performance convertibles, the M4 Competition’s fuel economy is fairly typical. The fuel economy of a 2020 Chevrolet Corvette Stingray Convertible, with its 6.2L V8, posts EPA ratings of 16 city and 24 highway. The Porsche 911 Carrera Cabriolet, with its turbocharged flat-six, might offer slightly better mileage at 18 city and 24 highway. Check M4 MPG across all years for more historical data. Ultimately, buyers in this segment are willing to sacrifice some fuel economy for the performance and driving experience these vehicles offer. Fuel costs are secondary to factors like prestige, handling, and that open-air driving sensation.

Tips to maximize efficiency

Employ smooth acceleration and braking. The M4’s twin-turbo engine is responsive, and aggressive pedal inputs will immediately trigger a downshift and a surge of power, which consumes more fuel, even when it’s not needed. Gradual acceleration allows the engine to operate more efficiently.

Use the Eco Pro driving mode when possible. Eco Pro mode re-maps the throttle response and shift patterns to prioritize fuel efficiency. While it does dampen the car’s performance noticeably, it can help to improve fuel economy during less spirited drives, such as commuting on the highway at a steady speed.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly, especially before long trips, and adjust them to the manufacturer’s recommended settings. Look for the appropriate tire pressure sticker on the driver’s side doorjamb or in the owner’s manual.

Avoid idling unnecessarily. If you’re stopped for more than a minute or two, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling consumes fuel without moving the car. This is particularly important in the city, where idling is more common.

Consider enrolling in a high-performance driving course. Learning how to drive smoothly and efficiently at higher speeds can translate to better fuel economy even during normal driving. Mastering techniques like throttle control and cornering can reduce unnecessary braking and acceleration, thereby improving fuel efficiency in the long run. Remember to check all Bmw fuel economy data for the models that suit your driving style.