17 MPG combined is the figure anyone considering the 2020 Mercedes-Benz AMG GT 63 S 4matic Plus will see. To dwell on it too long, however, is to miss the point. This is not a car bought by people prioritizing fuel efficiency. It’s a four-door coupe packing a hand-built, twin-turbocharged V8 delivering breathtaking performance, wrapped in a sculpted body that turns heads wherever it goes. The fuel bill is simply the price of admission to a very exclusive club.

City and highway performance

The EPA estimates the AMG GT 63 S at 15 MPG in the city and 20 MPG on the highway. The difference, though not huge, reflects the engine’s nature. In stop-and-go traffic, the thirsty V8 requires considerable fuel to get its mass moving. On the open road, with the transmission in its higher gears and the engine loafing in its powerband, 20 MPG is achievable, even occasionally surpassed, with judicious throttle control. Of course, resist the urge to unleash the engine’s full potential, and that highway number will plummet rapidly.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2020 Mercedes-Benz AMG GT 63 S 4matic Plus is exactly $3,400. This is based on driving 15,000 miles per year, with 55% of those miles in the city and 45% on the highway, using the national average fuel price when the EPA performed its tests. While individual fuel costs will vary depending on driving habits and local fuel prices, this figure provides a standardized benchmark for comparing the AMG GT 63 S to other vehicles. Potential buyers should factor this into their overall ownership costs, alongside insurance, maintenance, and depreciation.

Real-world expectations

While the EPA estimates offer a frame of reference, owners of the AMG GT 63 S should adjust their expectations regarding real-world fuel economy. Aggressive driving, a common occurrence with this vehicle due to its inherent performance capabilities, will negatively impact efficiency. Expect to see numbers below the EPA estimates, especially in city driving where the temptation to exploit the car’s immediate torque is strong. Conversely, more conservative highway driving during long road trips might yield figures closer to the 20 MPG mark.

How it compares

Few vehicles directly compete with the AMG GT 63 S for its blend of performance and (relative) practicality, but some alternatives exist. The Porsche Panamera Turbo S e-Hybrid, despite offering even more horsepower, achieves a combined EPA rating of 20 MPG thanks to its hybrid powertrain. The BMW M8 Gran Coupe manages approximately 17 MPG combined, mirroring the Mercedes-Benz. Audi’s RS7 is rated at 18 MPG combined, a slight edge over the AMG. These differences, though numerically small, can be significant over the long term. However,the purchasing decision for a car in this class rarely hinges solely on MPG. Other factors such as brand loyalty, styling, driving dynamics, and interior appointments often play a much larger role. For a broader view, review AMG MPG across all years.

Tips to maximize efficiency

While fuel efficiency might not be the primary concern for AMG GT 63 S owners, there are still steps one can take to minimize fuel consumption. Using the car’s “Comfort” driving mode, as opposed to “Sport” or “Sport+”, will dial back throttle response and shift points, encouraging more economical driving habits.

Avoid unnecessary idling. Modern engines consume fuel even when stationary, so turning off the engine during extended stops, rather than letting it idle, can save a measurable amount of fuel over time. The car’s auto start/stop system can help with this.

Ensure that tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check tire pressures regularly and maintain them at the recommended levels, which can be found on a sticker inside the driver’s side doorjamb.

Minimize aerodynamic drag. Removing roof racks or cargo carriers when not in use can improve airflow and reduce drag, particularly at highway speeds. While negligible in city driving, this could contribute to improved fuel economy on longer journeys.

Consider using the car’s cruise control function on the highway. Maintaining a constant speed can help reduce unnecessary acceleration and deceleration, leading to more consistent and potentially more efficient fuel consumption. Compare this number to all Mercedes Benz fuel economy data.