The 2018 BMW M6 Gran Coupe 4.4L gets a combined EPA fuel economy rating of 16 MPG. It’s clear that fuel efficiency isn’t its primary focus. This four-door coupe is designed for speed, offers abundant luxury, and features a twin-turbo V8 that accelerates to 60 mph in under four seconds, making fuel costs a secondary concern. Owners are typically prioritizing performance and exclusivity rather than fuel savings.

City and highway performance

The M6 Gran Coupe’s EPA ratings are 14 MPG in the city and 20 MPG on the highway. The city figure reflects the challenges of driving in urban stop-and-go traffic with a car designed for open roads. The powerful V8 and sporty transmission become less efficient when frequently accelerating from a standstill. The highway number, while better, is still not great compared to more efficient luxury vehicles. It reflects the demands of moving a heavy, high-performance car at higher speeds, even with the automatic transmission optimizing fuel consumption.

Annual fuel cost

The EPA estimates the annual fuel cost at $3,600 for the 2018 BMW M6 Gran Coupe. This is based on driving 15,000 miles per year, using a mix of city and highway driving, and the national average fuel price. Keep in mind that premium fuel is required, so you may see even higher costs at the pump. Whether a potential M6 Gran Coupe owner considers this a significant expense will depend on their finances, but the amount is noteworthy compared to many other cars.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy for the M6 Gran Coupe can vary widely based on how and where you drive. Aggressive acceleration, frequent hard braking, and extended idling will lower MPG. Highway trips at consistent speeds, using cruise control, and anticipating traffic flow can get you closer to the EPA estimate.

Consider the EPA numbers as estimates, not guarantees. Drivers who often use the M6’s performance capabilities should expect lower numbers, possibly in the low teens.

How it compares

The M6 Gran Coupe is in a niche with few direct competitors, but some alternatives exist. The Mercedes-AMG CLS63 S of the same period, for example, achieves a slightly better 18 MPG combined. Similarly, the Audi RS 7 offers a rated 18 MPG combined. These differences are small, so design preferences, brand loyalty, and the overall driving experience are likely more important when making a purchase decision. Buyers may also consider the Porsche Panamera Turbo, but with a similar combined MPG rating, it has its own set of advantages and disadvantages. You can view all BMW fuel economy data here. Also consider checking out M6 MPG across all years.

Tips to maximize efficiency

Drive smoothly. The M6 Gran Coupe’s power is tempting, but avoid constantly flooring the accelerator. Gentle acceleration and predicting traffic will lower fuel use.

Regular maintenance is important. Ensure the engine is properly tuned, the tires are correctly inflated, and the air filter is clean. This will improve engine performance and fuel efficiency.

Reduce idling. Idling wastes fuel without covering distance. If you expect a wait, turn off the engine.

Use cruise control on the highway to keep a consistent speed, reducing unnecessary acceleration and braking which improves fuel economy on longer trips.

Think about your drive mode settings. You might use Sport or Sport+ for spirited driving, but try Comfort or Efficiency modes for everyday driving. These modes change engine and transmission settings to prioritize fuel conservation.