23 MPG combined isn’t going to win any hypermiling awards, but the 2018 BMW 440i xDrive Convertible isn’t about squeezing every last drop of fuel. This is a car built for open-air cruising, spirited backroad drives, and making a statement. Buyers considering this vehicle understand that performance and luxury come at a price, and that price includes a moderate thirst for premium gasoline.

City and highway performance

The EPA estimates the 2018 BMW 440i xDrive Convertible at 20 MPG in the city and 29 MPG on the highway. This difference highlights the engine’s efficiency when cruising at steady speeds. The turbocharged 3.0L inline-six benefits from direct injection and variable valve timing, technologies optimized to deliver power when needed while minimizing fuel consumption when cruising on the open road.

Annual fuel cost

The EPA projects an annual fuel cost of $2,500 for the 2018 BMW 440i xDrive Convertible. This figure assumes driving 15,000 miles per year and using the national average fuel prices for premium gasoline. Your actual fuel costs may vary significantly depending on your driving habits, the type of driving you do (city vs. highway), and local fuel prices. For example, a driver exceeding 15,000 miles annually or living in a location with above-average fuel premiums can anticipate expenses surpassing $2,500. Conversely, a driver with a shorter commute and a lighter foot might see savings below this projection. Compare this cost to 440I MPG across all years.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy often differs. Aggressive acceleration, frequent stop-and-go traffic, and extended idling will all negatively impact your MPG. The xDrive all-wheel-drive system, while providing enhanced traction and stability, also adds weight and mechanical drag, which contributes to a slightly lower MPG compared to a rear-wheel-drive 440i convertible. However, many drivers find the added security of xDrive a worthwhile tradeoff, especially in regions with inclement weather. The driver selector modes (Eco Pro, Comfort, Sport, and Sport+) also have a big impact on fuel consumption. Eco Pro mode will maximize fuel efficiency and should get you closer to the 29 MPG highway rating.

How it compares

The 2018 BMW 440i xDrive Convertible’s fuel economy puts it in a competitive area. The Audi S5 Cabriolet, with its turbocharged V6, achieves a similar 21 MPG combined rating. Likewise, the Mercedes-Benz C43 AMG Cabriolet, a direct competitor, offers around 19 MPG combined. For buyers prioritizing less gas over all-out performance, the standard, non-AMG Mercedes C300 Cabriolet manages around 25 MPG combined, but sacrifices a significant level of performance. These numbers are important because they contextualize the choices buyers make when selecting a luxury convertible: performance, features, and brand cachet versus outright fuel efficiency. For all Bmw fuel economy data, check out all Bmw fuel economy data.

Tips to maximize efficiency

Use the driving modes. The Eco Pro mode alters throttle response and shift points to prioritize fuel savings. While it might not be the most engaging driving experience, it can significantly improve your MPG, especially during highway cruises or in congested city traffic.

Monitor your tire pressure regularly. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check your tire pressure at least once a month and keep them inflated to the recommended pressure listed on the doorjamb sticker.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume significantly more fuel than smooth, gradual inputs. Anticipate traffic flow and maintain a consistent speed whenever possible. The 440i’s refined powertrain rewards smooth operation, both in terms of fuel economy and overall driving enjoyment.

Minimize idling. If you’re stopped for more than a minute or two, turn off the engine. Idling consumes fuel without covering any distance. Modern engines are designed to restart quickly and efficiently, so there’s no need to let them run unnecessarily.