20 MPG combined. That’s the figure listed for the 2016 BMW 650i Convertible 4.4L 8-cyl on fuel economy websites, and it’s a number that matters less to the typical 650i buyer than to someone shopping for a Prius. This car is bought for the experience, the drama, and the joy of a powerful V8 and open-air motoring. Fuel economy is a consideration, but it’s less important than the sound, the feel, and the presence that this car delivers.

City and highway performance

The EPA estimates for the 650i convertible are 17 MPG in the city and 25 MPG on the highway. The city figure reflects the engine’s strong power delivery and the driver’s tendency to use it, especially from stoplights. Highway performance, while better, isn’t great. The 8-speed automatic transmission tries to keep the engine in its sweet spot, but a heavy convertible with this kind of horsepower won’t sip fuel on long drives. Drivers should expect a consistent range of performance, even if enthusiastic driving drops the numbers below the official estimates. See all Bmw fuel economy data for context across the lineup.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2016 BMW 650i Convertible at $2,900. This figure is based on driving 15,000 miles per year and using the national average fuel price. It’s useful for comparison, but individual driving habits and local fuel prices significantly impact the total. A driver who frequently uses premium fuel or drives more than 15,000 miles annually will see that number increase.

Real-world expectations

Real-world fuel economy for the 650i Convertible often differs from the EPA estimates, mostly due to driving style. The V8 engine encourages spirited acceleration, and the car’s weight demands more fuel to move around town. Those who can resist the urge to unleash the 445 horsepower regularly will likely see figures closer to the EPA estimates. However, enthusiastic drivers may find themselves closer to 15 MPG in the city and barely hitting 22 MPG on the highway. The 650i offers luxury and speed, and its drivers often indulge.

How it compares

Compared to its rivals, the 650i’s fuel economy falls within a specific range. The Mercedes-Benz SL550, another V8-powered convertible, achieves similar EPA numbers to the 650i. The Jaguar F-Type R Convertible offers even more horsepower but at the expense of fuel economy; expect to see roughly 16 MPG combined. The Audi S5 Convertible, with its supercharged V6, delivers better fuel economy, nearing 24 MPG combined. The S5 doesn’t offer the same V8 experience as the 650i and other competitors. These differences are importatn to those who cross-shop these cars, they define the ownership experience and affect the operating costs. If you’re curious about 650I MPG across all years, you’ll see a consistent trend.

Tips to maximize efficiency

While fuel economy might not be critical for the 650i Convertible owner, there are ways to reduce fuel consumption without sacrificing too much enjoyment. Avoid aggressive acceleration and hard braking. The 650i responds well to smooth inputs, and that will mean fewer trips to the gas station.

Use the driving modes. Comfort mode, while not as engaging as Sport or Sport+, optimizes the engine and transmission for fuel efficiency. It’s suitable for highway cruising or navigating city traffic where outright performance isn’t needed.

Ensure your tires are properly inflated. 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 for efficiency and tire life.

Minimize unnecessary weight. Carrying extra cargo in the trunk or cabin adds to the vehicle’s weight and reduces fuel economy. Remove any items you don’t need to lighten the load and improve efficiency.

Routine maintenance is important, too. A properly maintained engine will run more efficiently. Follow the manufacturer’s recommended service schedule, including oil changes, filter replacements, and spark plug maintenance.