19 MPG combined. To be blunt, the 2023 BMW M850i xDrive Coupe isn’t winning any fuel efficiency contests. That figure is nearly irrelevant for those who truly understand what this car represents: a luxurious, high-performance GT coupe offering devastating speed and a sensory experience that prioritizes thrills over thrift. The M850i serves a specific clientele: successful professionals, entrepreneurs, and driving enthusiasts who value exclusivity, power, and a rewarding driving experience above all else. They accept the fuel consumption as a cost of admission.

City and highway performance

The EPA estimates of 17 MPG in the city and 24 MPG on the highway reflect the M850i’s character. Urban driving invariably involves stop-and-go traffic, which punishes any large-displacement engine, especially a twin-turbocharged 4.4-liter V8. But even in these conditions, the M850i delivers ferocious acceleration when needed. The highway figure of 24 MPG suggests the engine is relatively relaxed when cruising at a constant speed. However, even slight throttle inputs to overtake or maintain momentum on inclines will see that number drop quickly. The reality is that the M850i’s prodigious power and engaging driving dynamics tempt drivers to exploit its capabilities, further impacting fuel economy.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2023 BMW M850i xDrive Coupe at $3,050. This figure is based on driving 15,000 miles per year, with an equal split between city and highway driving, using the EPA’s combined MPG rating and assuming national average fuel prices. Individual fuel costs will vary based on driving habits, local fuel prices, and the type of fuel used (premium fuel is recommended). However, $3,050 is a realistic benchmark for prospective buyers.

Real-world expectations

Anyone expecting to consistently achieve the EPA’s figures in real-world driving is likely kidding themselves. The M850i’s intoxicating blend of power, sound, and handling encourages spirited driving. Owners who frequently enjoy the car’s full potential will likely see average fuel economy closer to the low end of the EPA range, perhaps even dipping below 17 MPG in mixed driving. Those who adopt a more restrained driving style and primarily use the car for long highway journeys might approach the EPA’s highway estimate. Realistically, expect somewhere between 16 and 22 MPG as a daily average. Check out all M850I MPG across all years.

How it compares

Compared to its competitors, the M850i’s fuel economy sits roughly where you’d expect. The Mercedes-AMG SL63, with its similarly potent V8, achieves an EPA-estimated 16 MPG city and 23 MPG highway. The Porsche 911 Carrera 4S, a slightly smaller but equally performance-focused coupe, fares better, with ratings of 18 MPG city and 25 MPG highway. An Audi S7 with its turbo V6 comes in at 19 city and 26 highway. Buyers in this segment aren’t deciding solely based on MPG; however, the differences become a factor for those trying to justify the running costs. Choosing an M850i is a decision based on its unique blend of luxury, performance, and brand cachet, not its ability to sip fuel. Explore all Bmw fuel economy data.

Tips to maximize efficiency

While fuel economy may not be a primary concern for M850i owners, there are still steps that can be taken to minimize fuel consumption. Avoid aggressive acceleration and braking. The M850i’s instant torque delivery is addictive, but consistently flooring the throttle will significantly impact fuel efficiency. Use smooth, progressive acceleration instead.

Use the car’s driving modes. The M850i offers various driving modes, including Comfort and Eco Pro. Selecting these modes optimizes the engine and transmission settings for efficiency, often resulting in lower fuel consumption, especially during steady-state cruising. Don’t be afraid to use these modes during relaxed driving scenarios.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Regularly check tire pressures and inflate them to the recommended levels (found on the doorjamb sticker). This simple act can improve fuel economy and tire life.

Minimize idling. Modern engines are remarkably efficient when running, but idling burns fuel without covering any distance. Turn off the engine when stopped for more than a minute or two, especially in traffic. The start/stop system helps with this, but can be manually disabled as needed.