The 17 MPG combined from the 2023 Mercedes-Benz AMG GT 63 4MATIC+ isn’t going to win any awards for lower fuel costs, nor is it intended to. This is a four-door coupe with a hand-built, twin-turbocharged V8. Its primary objective is to deliver exhilarating performance and a visceral driving experience, and not to sip fuel conservatively. This car exists for a specific buyer: someone who prioritizes power, prestige, and driving dynamics above all else, and who likely has other, more economical vehicles in their garage.

City and highway performance

The EPA estimates 15 MPG in the city and 21 MPG on the highway for the AMG GT 63. The large discrepancy between city and highway figures tells how this car is likely driven. Urban environments involve stop-and-go traffic, frequent bursts of acceleration, and the added weight of all-wheel drive constantly engaged, all factors that contribute to lower fuel efficiency.

On the open road, where the car can cruise at a steady speed and use its nine-speed automatic transmission to its advantage, the MPG figure improves, though it’s still far from economical.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2023 Mercedes-AMG GT 63 4MATIC+ is $3,400. This calculation is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. This number might seem shocking to some, but it’s a cost many AMG GT 63 owners are prepared to shoulder. They understand that owning and operating a high-performance vehicle comes with inherent expenses beyond the initial purchase price.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy in the AMG GT 63 can vary significantly based on driving style and conditions. Someone who frequently unleashes the car’s 630 horsepower and enjoys its thrilling acceleration will likely see numbers below the EPA estimates. Conversely, a driver who adopts a more relaxed approach and spends a lot of time on the highway might achieve figures closer to, or even slightly above, the 21 MPG highway rating.

Aggressive starts, frequent use of the Sport+ driving mode, and consistent urban driving will all negatively impact fuel economy. The engine is designed to be run premium fuel.

How it compares

Compared to its competitors, the AMG GT 63’s fuel economy is generally in line with other high-performance, V8-powered luxury vehicles. The Porsche Panamera Turbo, for instance, is rated at 18 MPG combined, making it very similar. The BMW M8 Gran Coupe delivers approximately 17 MPG combined as well. These figures highlight the trade-off inherent in choosing a high-performance vehicle. For a slight improvement one could consider the Audi RS7, capable of 22MG combined according to the EPA.

These fuel economy comparisons matter because these specific marques are often cross-shopped by very affluent buyers. You can view all Mercedes Benz fuel economy data here, in addition to AMG MPG across all years. This allows drivers to identify Mercedes-Benz models that prioritize fuel efficiency.

Tips to maximize efficiency

While the AMG GT 63 isn’t designed for hypermiling, there are still ways to improve its fuel economy. Avoid aggressive acceleration and braking. Smooth, consistent driving will not only conserve fuel but also enhance the overall driving experience, allowing you to appreciate the car’s refined performance and chassis balance.

Take advantage of the car’s driving modes. The “Comfort” mode, for example, will optimize the engine and transmission settings for fuel efficiency, while still providing ample power when needed. Though it is tempting to leave it in “Sport+” or “Race” at all times, resist the urge and use the appropriate mode for the driving conditions.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and maintain the recommended levels, paying close attention to the specifications for your specific tire size and driving conditions.

Minimize idling. If you find yourself waiting for more than a minute or two, turn off the engine. Excessive idling consumes fuel unnecessarily, especially in a large-displacement engine like the AMG GT 63’s V8.

Consider using cruise control on the highway. Maintaining a consistent speed can improve fuel economy compared to fluctuating the throttle. The AMG GT 63’s advanced cruise control system can help maintain a steady speed and distance from other vehicles, further enhancing efficiency.