The 2022 BMW M850i xDrive Convertible gets 19 MPG combined. A six-figure, V8-powered, all-wheel-drive drop-top isn’t expected to be fuel-efficient. For those who can afford it, the M850i offers a blend of performance and luxury that makes frequent gas station stops a minor inconvenience.

City and highway performance

The M850i convertible’s 17 MPG city rating reflects stop-and-go driving. The 4.4-liter twin-turbo V8 needs fuel to deliver its effortless thrust, and the xDrive all-wheel-drive system adds weight and drivetrain loss. The same engine is more efficient on the highway, achieving 24 MPG. The eight-speed automatic transmission helps, keeping the engine in its most efficient operating range. Long highway cruises are ideal for this car. You’ll maximize efficiency while enjoying the open air and the engine’s impressive power reserve for instant acceleration.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2022 BMW M850i xDrive Convertible at $3,050. This is based on driving 15,000 miles per year, with 55% in the city and 45% on the highway, using national average fuel prices. Individual fuel costs will vary based on driving habits and local fuel prices. Drivers who accelerate quickly or mostly drive in congested city centers will likely exceed this estimate. People sticking to highway driving and using a light touch may see slightly lower costs.

Real-world expectations

EPA estimates provide a standardized baseline, but real-world fuel economy often differs. The M850i’s tempting power delivery is a key factor. The urge to unleash that V8 is strong, and frequent acceleration will quickly lower your MPG. The M850i’s weight and all-wheel-drive system also increase fuel consumption. Expect the combined MPG to change depending on your driving style. Those who want performance will likely see numbers closer to the city rating, while those who try to save fuel might approach the highway figure. Those planning to lower the top and hear the engine should consider bringing a gas card.

How it compares

The M850i isn’t the most economical choice in its class. A Mercedes-AMG SL63, with comparable performance, often gets slightly better fuel economy, around 16 MPG city and 23 MPG highway. Certain trims of the Porsche 911 Cabriolet are even better. Even with all-wheel drive, some 911 variants exceed the M850i, achieving around 18 MPG city and 25 MPG highway. However, people shopping the M850I MPG across all years likely prioritize the BMW’s blend of luxury, performance, and grand touring capability, which its rivals may not match. Others might find better fuel efficiency when reviewing all Bmw fuel economy data, but no other BMW offers this blend of performance and open-top luxury.

Tips to maximize efficiency

Don’t accelerate too fast. The M850i’s V8 is appealing, but careful acceleration matters. Gentle starts and steady speed can greatly improve fuel efficiency, especially around town.

Use the car’s driving modes. The Eco Pro mode optimizes vehicle settings, including throttle response and shift points, to prioritize fuel efficiency. It reduces performance, but it’s a good option for longer cruises or when saving fuel is important.

Make sure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressures regularly and keep them at the recommended levels, found on the doorjamb sticker.

Remove unnecessary weight. Extra cargo in the trunk adds weight and reduces fuel efficiency. Remove any items you don’t need to carry regularly. Every pound matters when moving hundreds of pounds of car.

Plan your routes to avoid stop-and-go traffic. Congestion negatively impacts fuel economy, especially in a car with a large engine like the M850i. Use navigation apps to find the most efficient route, even if it takes a few minutes longer.