24 MPG combined, that’s the fuel economy of the 2018 BMW 440i Convertible with its smooth 3.0L inline-six. It’s a number that won’t win any awards for lower fuel costs, but it’s also not the primary concern for someone choosing wind-in-your-hair thrills and the distinctive burble of a Bavarian straight-six. This car is about the driving experience, and while efficiency is always a consideration, it sits a distant second to driving pleasure.

City and highway performance

The EPA estimates suggest 21 MPG in the city and 29 MPG on the highway for the 2018 BMW 440i Convertible, equipped with the automatic (S8) transmission. That spread reflects the engine’s duality. Around town, the stop-and-go nature of urban driving taxes the 3.0L engine, especially with its eagerness to rev. But out on the open road, the 440i settles into a relaxed cruise, the engine barely working hard as it maintains a steady speed. The eight-speed automatic helps here, keeping the engine in its sweet spot for both power and economy at highway speeds. Drivers who prioritize backroad blasts over interstates may see lower highway numbers; this powertrain rewards a gentle foot.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 BMW 440i Convertible at $2,400. This figure is calculated assuming 15,000 miles of driving per year, using the national average fuel prices at the time of the estimate. Keep in mind that fuel prices fluctuate, and your actual costs will vary depending on your driving habits and where you live and fuel. This is money you’ll have to plan to spend if you choose the 440i.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy for the 2018 440i Convertible can vary. Drivers with a heavy foot or who frequently engage the engine’s sportier modes will see numbers closer to the city estimate, or even lower. Those who prioritize smooth acceleration and consistent highway speeds might nudge the highway figure up slightly. The key is managing your expectations, understanding the car’s character, and driving accordingly. The turbocharged engine is sensitive to throttle input, and aggressive driving is sure to penalize fuel economy.

How it compares

Compared to its competitors, the 2018 BMW 440i Convertible lands in the middle of the pack. The Audi A5 Cabriolet, with its 2.0L turbocharged four-cylinder, achieves a slightly better 27 MPG combined. The Mercedes-Benz C300 Cabriolet, also with a 2.0L turbo, mirrors the A5’s fuel economy. However, neither of those cars can match the 440i’s inline-six for smoothness and power delivery. If you want a V8-powered Mustang GT Convertible, that drops you to around 19 MPG combined, a significant penalty for more brute force. For those interested in all Bmw fuel economy data, there’s plenty to explore. The choice comes down to balancing performance, luxury, and fuel efficiency, and understanding what matters most to you. Consider the 440I MPG across all years to see any trends.

Tips to maximize efficiency

Using the 440i’s Eco Pro mode can yield worthwhile fuel savings, especially during highway driving. This mode remaps the throttle response and optimizes the transmission for maximum efficiency. It won’t transform the car into a Prius, but it can noticeably reduce fuel consumption on long journeys.

Regular maintenance, including tire inflation and oil changes, plays an important role in maintaining optimal fuel economy. Underinflated tires increase rolling resistance, forcing the engine to work harder. Similarly, old or dirty oil can reduce engine efficiency, impacting fuel consumption over time.

Anticipate traffic flow and avoid unnecessary acceleration and braking. Aggressive driving habits are the enemy of fuel efficiency. Smooth and gradual acceleration, with anticipation of traffic patterns, minimizes fuel waste. Use the car’s momentum to your advantage.

Limit the use of accessories that draw heavily on the car’s electrical system, such as the air conditioning and heated seats. These systems put a load on the alternator, which in turn requires more fuel to operate. Use them sparingly when fuel economy is critical.