17 MPG combined is the price of admission to the 2025 BMW M8 Competition Coupe club. This isn’t a vehicle purchased for its ability to sip fuel; it’s a high-performance grand tourer designed to deliver blistering acceleration and razor-sharp handling. For the driver who prioritizes raw power and a thrilling driving experience over saving money at the pump, this number, while certainly not impressive, is simply a cost of owning the car.

City and highway performance

The M8 Competition’s EPA ratings reveal a split personality that reflects its intended usage. In the city, it manages a dismal 15 MPG, a figure that should surprise nobody familiar with the demands of stop-and-go traffic on a twin-turbo V8. The highway number fares slightly better at 22 MPG, offering some efficiency during longer cruises where the engine isn’t constantly cycling through boost. But even that 22 MPG is nowhere near the domain of efficient vehicles; it is merely the best this 617-horsepower beast can muster when given a clear stretch of road. It’s a tale as old as the internal combustion engine itself: power demands fuel, and the M8 Competition has power to spare.

Annual fuel cost

The EPA estimates that the 2025 BMW M8 Competition Coupe will rack up an annual fuel bill of approximately $3,400. This figure is based on driving 15,000 miles per year, with a roughly even split between city and highway driving, and using the EPA’s assumed national average fuel price. Of course, the actual fuel cost for any given owner will vary based on driving habits, location, and prevailing fuel prices, but $3,400 provides a measure for understanding the ongoing expense of owning this high-performance coupe.

Real-world expectations

While the EPA provides a standardized testing environment, real-world conditions often deviate. M8 Competition owners should realistically expect fuel economy to fluctuate depending on how aggressively they drive. Frequent use of the car’s launch control, extended periods spent in Sport or Sport+ mode, and a heavy right foot will all reduce fuel economy well below the EPA estimates. On the other hand, a conscious effort to drive conservatively, using the car’s comfort mode and practicing smooth acceleration, might yield numbers closer to the EPA’s projections. However, let’s be honest: few purchase an M8 Competition to drive it like a Prius.

How it compares

The M8 Competition occupies a unique space, blurring the lines between a grand tourer and a pure sports car. Comparing it directly to other vehicles reveals its positioning. The Mercedes-AMG GT 63 S Coupe, another high-performance four-door coupe with a similar mission, achieves a combined 16 MPG. The Porsche 911 Turbo S, a more focused sports car, manages 17 MPG combined, matching the M8. Even the less powerful Lexus LC 500, with its naturally aspirated V8, only manages a combined 19 MPG. This comparison highlights a reality: vehicles delivering this level of performance inevitably come with a fuel consumption penalty. Drivers who demand both opulent luxury and breathtaking performance are unlikely to cross-shop with economical vehicles, but seeing all Bmw fuel economy data provides additional context.

Tips to maximize efficiency

While the M8 Competition isn’t designed for fuel sipping, there are steps drivers can take to minimize consumption. Avoid aggressive acceleration and braking; smooth inputs are always more efficient. Plan your routes to minimize stop-and-go traffic. Constant acceleration and braking waste fuel.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and burn more fuel. Check tire pressure regularly and inflate to the recommended specification, which can be found on the driver’s side doorjamb.

Reduce unnecessary weight in the vehicle. Extra weight puts strain on the engine and reduces fuel economy. Remove any items from the trunk that serve no purpose on your daily drive.

Use the car’s driving modes strategically. Select “Comfort” mode for relaxed cruising, as it optimizes the engine and transmission settings for efficiency rather than outright performance. Sport and Sport+ modes are more engaging but will significantly increase fuel consumption.

Consider the long-term benefits of proper maintenance. Regular engine tune-ups, oil changes, and air filter replacements will ensure the engine runs efficiently and maintain optimal fuel economy. And while browsing M8 MPG across all years might offer some broader context, the bottom line remains: this is a high-performance machine.