19 MPG combined is what you should expect for the 2018 BMW M4 Convertible. To be clear, most people don’t buy an M4 Convertible because of its fuel efficiency. They buy it for the exciting combination of a high-revving inline-six, razor-sharp handling, and the thrill of open-top motoring. The fuel economy is the compromise accepted for the explosive performance. It’s a memorable drive that prioritizes driver engagement, and fuel consumption is secondary.

City and highway performance

The EPA estimates for the 2018 M4 Convertible are 16 MPG in the city and 22 MPG on the highway. The city figure reflects stop-and-go traffic, where the M4’s turbocharged engine spends more time idling or accelerating from a standstill, which reduces fuel. Highway driving, while better, is still impacted by the car’s eagerness to accelerate and its aerodynamic inefficiencies because it’s a convertible. Drivers are less likely to achieve the EPA’s highway estimate when frequently passing other cars or using the car’s power.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2018 BMW M4 Convertible at $3,050. This figure is based on driving 15,000 miles per year, using a blend of city and highway driving, and assuming national average fuel prices. It’s a useful benchmark, but your actual fuel cost will vary depending on your driving habits, local fuel prices, and the type of fuel you use. The M4 requires premium fuel, so its cost per gallon will exceed that of regular gasoline.

Real-world expectations

Drivers rarely achieve EPA estimates in performance cars because they want to use the M4’s power. Expect a realistic combined MPG closer to the low end of the EPA range, or even slightly below, if you accelerate quickly. However, careful driving, especially on long highway journeys, could bring you closer to the estimated figures. MPG will depend on your driving style.

How it compares

The M4 Convertible exists in a niche market of high-performance, drop-top sports cars. Its fuel economy isn’t a selling point, but comparing it to similar vehicles provides context.

The Mercedes-AMG C63 S Convertible, also with a powerful engine, delivers similar fuel economy. A Porsche 911 Carrera Cabriolet, with its iconic flat-six engine, achieves slightly better fuel economy, around 20 MPG combined. The Audi RS5 Cabriolet delivers slightly improved fuel efficiency at 21 MPG combined. The importance of these differentials to the M4 buyer is minimal because they are purchasing a specific blend of performance, handling, and style from BMW. For alternatives with better numbers, check all Bmw fuel economy data to widen the search.

Tips to maximize efficiency

Don’t accelerate too quickly. Smooth acceleration and gentle braking will conserve fuel. Consistent speed on the highway will also benefit fuel economy. Drive less aggressively.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which makes the engine work harder and burn more fuel. Consult the sticker on your driver’s side door frame for the recommended tire pressure.

Reduce unnecessary weight. Carrying extra cargo in the trunk or passenger seat adds to the vehicle’s weight, reducing fuel efficiency. Remove anything you don’t need.

Use the M4’s driving modes. The “Eco Pro” mode prioritizes fuel efficiency by adjusting throttle response and transmission settings. While it may tame the car’s performance, it can improve MPG, especially in city driving. You can search M4 MPG across all years to better understand the vehicle’s efficiency.

Consider enrolling in a performance driving program. These courses can improve driving smoothness and anticipation, which translates to better fuel efficiency under normal driving conditions. You’ll also learn the limits of the M4 in a controlled environment, reducing the temptation for risky maneuvers on public roads.