The 2020 BMW M240i xDrive Convertible 3.0L 6-cyl achieves 25 MPG combined. While not class-leading, it’s acceptable for a car designed for top-down thrills and strong turbocharged performance. This car prioritizes fun and practicality over ultimate fuel efficiency; it’s for enthusiasts who want a compact, engaging daily driver with a folding soft top.

City and highway performance

EPA estimates for the M240i xDrive Convertible are 22 MPG in the city and 30 MPG on the highway. The city figure reflects stop-and-go traffic, where the turbocharged 3.0-liter inline-six engine and eight-speed automatic transmission will use more fuel. The highway number shows the engine’s efficiency at constant speeds. Reaching 30 MPG on long road trips is achievable, especially when avoiding aggressive acceleration and enjoying the engine’s passing power.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 BMW M240i xDrive Convertible at $2,300. This is based on 15,000 miles driven per year, a mix of city and highway driving, and national average fuel prices. Actual fuel costs will vary depending on driving habits, fuel type, and local gas prices. Driving significantly more than 15,000 miles per year, or higher fuel prices, will increase your annual fuel expenses.

Real-world expectations

EPA estimates are a baseline, but real-world fuel economy varies. M240i xDrive Convertible drivers will likely see figures around the EPA estimates, influenced by driving style and road conditions. Frequent, spirited driving leads to numbers closer to the city estimate, while smooth highway cruising can achieve or exceed the 30 MPG highway figure. The xDrive all-wheel-drive system, while improving traction, can slightly reduce fuel economy compared to rear-wheel-drive models.

How it compares

The M240i’s fuel economy is competitive in the small, sporty convertible class. A Mazda MX-5 Miata achieves significantly better numbers (29 MPG combined) due to being less powerful and luxurious. A close competitor is the Audi S3, with a similar 26 MPG combined, while other high-performance AWD convertibles such as the Porsche 718 Boxster trails it slightly at 24 MPG combined. Consider comparing all Bmw fuel economy data before committing to the M240i. The M240i balances performance, luxury, and reasonable fuel consumption. See M240I MPG across all years to understand fuel economy trends.

Tips to maximize efficiency

Use the M240i’s driving modes. “Eco Pro” mode adjusts the throttle response and shift points to improve fuel efficiency. This reduces performance slightly, but can noticeably reduce fuel consumption during city driving or on long highway trips.

Keep the tires properly inflated. Underinflated tires increase rolling resistance, requiring the engine to work harder and consume more fuel. Check tire pressure regularly and inflate to the levels on the driver’s side doorjamb.

Avoid aggressive driving, such as rapid acceleration and hard braking. Smooth acceleration and braking uses less fuel. Anticipate traffic flow and maintain a steady speed. The M240i’s engine encourages spirited driving, but restraint saves gas.

Reduce unnecessary weight in the car. Extra weight in the trunk or backseat reduces fuel economy. Remove any items not regularly needed.

Consider cruise control on the highway. A steady speed from cruise control can improve fuel economy, particularly on flat roads. Avoid cruise control on hills, as the system may downshift frequently, reducing fuel savings.