26 MPG combined won’t win any hypermiling awards, but it’s perfectly acceptable for what the 2015 BMW 228i Convertible 2.0L is: affordable top-down thrills with German engineering. This isn’t a Prius; it’s a small, sporty convertible designed for drivers who value a connected driving experience over squeezing every last mile from a gallon of fuel. Buyers prioritize the responsive handling, punchy turbo engine, and open-air enjoyment. Fuel economy is a consideration, but rarely the main one.

City and highway performance

The EPA estimates give a clearer picture of the 228i Convertible’s fuel consumption. Around town, the 23 MPG city rating is respectable, enough to avoid feeling penalized in stop-and-go traffic. Out on the open road, the 33 MPG highway figure demonstrates the engine’s efficiency when cruising. The eight-speed automatic transmission plays a crucial role here, keeping the engine in its ideal range for both performance and economy. Remember that these figures are for the automatic (S8) transmission. While less common, the 228i was also offered with a manual, which tends to slightly affect fuel economy, usually downwards.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 BMW 228i Convertible at exactly $2,250. This figure is calculated based on driving 15,000 miles per year, using national average fuel prices. It’s a useful benchmark for comparing running costs with other vehicles. Keep in mind that real-world fuel costs will fluctuate based on driving habits, local fuel prices, and the specific type of gasoline used. Premium fuel is recommended for optimal performance, which will further influence the total cost.

Real-world expectations

While the EPA provides a standardized estimate, your actual MPG will vary. Aggressive driving, frequent short trips, and extended idling will all negatively impact fuel consumption. On the other hand, careful acceleration, consistent speeds, and proper tire inflation can help you achieve or even exceed the EPA estimates. Also, altitude and temperature can affect MPG.

How it compares

The 228i Convertible occupies a unique space in the market. Compared to other sporty convertibles in its price range, its fuel economy is competitive. For instance, the Mazda MX-5 Miata, while offering similar driving thrills, achieves a slightly better 29 MPG combined. However, the Miata sacrifices practicality and refinement compared to the BMW. A more direct competitor, such as the Audi A3 Cabriolet (discontinued after 2019), posts similar fuel economy figures in its turbocharged 2.0L guise (around 27 MPG combined) but lacks the same level of driver engagement that BMW is known for. Even the Nissan 370Z Roadster, with its powerful V6, struggles to achieve more than 20 MPG combined, making the Bmw a more sensible choice for efficiency. For a broader view, check all Bmw fuel economy data to get a better understanding of how it sits in the lineup.

Tips to maximize efficiency

Use the BMW’s driving modes. The “Eco Pro” mode prioritizes fuel efficiency by adjusting throttle response, transmission shift points, and climate control settings. While it might slightly dampen the sporty feel, it can make a noticeable difference on longer journeys. It’s easy to forget it is engaged, so pay attention to the dashboard alerts.

Regular maintenance is an important factor for optimal fuel economy. Ensure that the tires are properly inflated, the engine is properly tuned, and the air filter is clean. A well-maintained engine will burn fuel more efficiently. This is especially important for turbocharged engines like the one in the 228i.

Smooth and steady acceleration is important. Avoid aggressive acceleration and hard braking, as these actions consume more fuel. Anticipate traffic flow and maintain a consistent speed whenever possible. Highway driving with cruise control is a great way to improve fuel economy.

Minimize idling. Excessive idling wastes fuel and contributes to emissions. If you’re stopped for more than a minute, turn off the engine. Modern cars are designed to restart quickly and efficiently, so there’s no need to keep the engine running unnecessarily.

Consider the weight you’re carrying. Excess weight in the vehicle can reduce fuel economy. Remove any unnecessary items from the trunk and passenger compartment. Every little bit helps. Check the 228I MPG across all years to see how consistent these principles are for this model from BMW.