The 2020 BMW 230i Convertible, with its 2.0L 4-cyl engine, gets 27 MPG combined. This isn’t class-leading, but it’s a perfectly acceptable trade-off for a stylish, rear-wheel-drive convertible that prioritizes the driving experience. This car is for enjoying sunny weekend drives and making a statement. Buyers are seeking a particular look and open-air experience; fuel economy is a secondary concern, not the main one.

City and highway performance

The Environmental Protection Agency (EPA) rates the 2020 BMW 230i Convertible at 23 MPG in the city and 34 MPG on the highway. The highway numbers are respectable, showing the efficiency of the 2.0L turbocharged four-cylinder engine when cruising at steady speeds. The eight-speed automatic transmission (S8) also plays a key role, keeping the engine in its optimal rev range.

However, the city figure reflects the reality of stop-and-go traffic and the engine’s increased fuel consumption during acceleration. The 230i’s relatively low weight for a modern car helps it achieve above-average MPG compared to larger luxury vehicles.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2020 BMW 230i Convertible at $2,150. This figure assumes 15,000 miles driven per year and national average fuel prices. Premium fuel is recommended for optimal performance in the 230i’s engine, which will affect this estimate. Individual driving habits, local fuel prices, and driving type (mostly city versus mostly highway) will also cause the actual fuel cost to vary. However, this provides a useful benchmark for comparing the 230i to other vehicles in its class.

Real-world expectations

The EPA provides standardized testing data, but real-world driving conditions matter. Spirited driving, frequent short trips, and aggressive acceleration will all negatively impact fuel economy. Owners who prioritize fuel efficiency and adopt smoother driving habits are more likely to achieve numbers closer to the EPA estimates, or even slightly exceed them on long highway trips. Regular maintenance, including proper tire inflation and timely oil changes, also helps maintain optimal fuel efficiency. For those interested in seeing 230I MPG across all years, there is a substantial amount of data from other owners.

How it compares

The BMW 230i compares well to other sporty convertibles in terms of fuel economy. The Mazda MX-5 Miata gets around 29 MPG combined, but it’s a significantly smaller and less powerful car. A more powerful convertible, such as the Ford Mustang EcoBoost Convertible (around 25 MPG combined), will have lower overall fuel economy. The Audi A3 Cabriolet, before it was discontinued, had similar fuel economy figures of around 28 MPG combined but lacked the 230i’s rear-wheel-drive dynamic. These comparisons are important for buyers weighing performance, driving dynamics, and fuel costs in their convertible purchase.

Tips to maximize efficiency

Avoid aggressive acceleration and braking. The 230i’s turbocharged engine responds quickly, but gentle throttle inputs will significantly improve fuel consumption, especially in city driving. Anticipate traffic flow and maintain a steady speed whenever possible.

Use the ECO PRO driving mode. This mode adjusts various vehicle settings to prioritize fuel efficiency, including throttle response and shift points. It might slightly reduce the sporty feel, but it can make a noticeable difference on longer drives.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure regularly and maintain the recommended levels specified on the door jamb sticker.

Minimize unnecessary weight. Carrying extra cargo in the trunk or passenger compartment adds weight to the vehicle, reducing fuel efficiency. Remove any items that are not essential for your daily driving.

Consider the impact of the convertible top. Driving with the top down increases aerodynamic drag, which can slightly reduce fuel economy, particularly at higher speeds. However, the difference is often small in urban driving. If you would like to explore all Bmw fuel economy data for other models, there is lots available.