18 MPG combined is what you’d expect and accept from the 2025 Mercedes-Benz AMG GT 63 S E Performance, a four-door missile engineered to deliver astonishing performance and a genuinely visceral driving experience, not to win efficiency contests. This is a vehicle purchased by those who demand peak automotive engineering, where the cost of premium fuel is merely a footnote to the symphony of a twin-turbo V8 working with hybrid electrics.

City and highway performance

Looking at the specifics, the AMG GT 63 S E Performance delivers 16 MPG in the city and 19 MPG on the highway. These figures, while seemingly modest by commuter car standards, are remarkably efficient for a vehicle that deploys a 4.0L 8-cylinder engine and a plug-in hybrid system to produce over 800 horsepower. The city MPG, in particular, benefits from the electric motor’s ability to assist at lower speeds, allowing for strong torque delivery without solely relying on the internal combustion engine. On the open road, the 9-speed automatic transmission works diligently to keep the engine in its most efficient band, contributing to that 19 MPG highway figure. However, it’s crucial to understand that these numbers are achievable under controlled conditions; enthusiastic acceleration, which this car practically begs for, will undoubtedly see those figures drop. This is a car designed to be driven hard, and its fuel economy reflects the inherent compromises of extreme performance.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,200 for the 2025 Mercedes-Benz AMG GT 63 S E Performance. This figure is calculated based on an average driving distance of 15,000 miles per year and national average fuel prices for premium gasoline. For prospective owners, this represents a meaningful but often secondary consideration. The individual purchasing this vehicle is fully aware of the running costs associated with a high-performance, German-engineered machine. The $3,200 annual fuel bill reflects the vehicle’s inherent thirst for premium fuel and its performance capabilities, which are, frankly, priceless to its target demographic. It’s part of the ownership cost for a car that offers luxury, speed, and exclusivity.

Real-world expectations

Expectations for fuel economy in the AMG GT 63 S E Performance must be tempered by the vehicle’s true purpose. While the EPA figures provide a baseline, they rarely reflect the reality of driving a car like this. The twin-turbocharged V8, combined with the substantial weight and the driver’s likely propensity for spirited acceleration, means that achieving the stated 18 MPG combined is more of an academic exercise than a regular occurrence. The “E Performance” designation signals a plug-in hybrid component, offering a limited all-electric range that can improve urban efficiency if diligently used. However, the allure of 800+ horsepower is potent, and few owners will resist unleashing it. Think of the electric drive as a smart performance enhancer and a way to quietly glide through neighborhoods, not primarily as a range extender or MPG booster. True real-world economy will largely depend on driving style and how frequently the car’s immense power reserves are tapped. For more insights on the brand’s efficiency across its portfolio, explore all Mercedes Benz fuel economy data.

How it compares

In its rarefied segment, the AMG GT 63 S E Performance competes with other high-performance luxury four-doors that also make few concessions to fuel economy. Consider the Porsche Panamera Turbo S E-Hybrid, which often hovers around 20-22 MPG combined when factoring in its electric range, or the BMW M8 Gran Coupe, which typically delivers 17 MPG combined. The difference of a single MPG point here or there is largely academic to the buyer. For instance, the Panamera Turbo S E-Hybrid is often lauded for its blended efficiency, benefiting from its plug-in hybrid architecture similarly to the AMG GT, yet it maintains its performance credentials. The BMW M8 Gran Coupe, often relying solely on its twin-turbo V8, sits closer to the lower end of the spectrum alongside pure internal combustion competitors. The deciding factor for a buyer isn’t typically the fractional MPG advantage but rather the subjective driving dynamics, brand loyalty, and the precise blend of luxury and performance each vehicle offers. The AMG GT’s blend of raw power and hybrid integration positions it as a true contender, with its fuel economy being entirely commensurate with its mission. Further comparisons can be found by examining AMG MPG across all years.

Tips to maximize efficiency

While outright efficiency isn’t the primary goal of the AMG GT 63 S E Performance, driving can certainly help optimize its fuel consumption without sacrificing enjoyment. Begin by making full use of the electric-only driving capabilities, especially for short urban commutes. Pre-conditioning the cabin while plugged in also reduces the energy draw on the battery or engine when you start your drive.

Using the various driving modes offered by AMG can also make a difference. Comfort or Electric driving modes will prioritize efficiency and often rely more heavily on the electric motor, transforming the car’s character from a snarling beast into a more docile, economically minded cruiser for everyday tasks.

Smooth acceleration and braking are important. While the temptation to experience the V8’s surge is always present, gentle inputs conserve fuel. The regenerative braking system in the E Performance model will also recapture energy during deceleration, charging the battery and reducing the need for the engine to directly power the alternator.

Regular maintenance, including proper tire inflation and timely service, ensures that the engine and hybrid components are running at their peak efficiency. A well-maintained vehicle always performs better and consumes less fuel over its lifespan, ensuring all 800+ horses are pulling their weight effectively.

Finally, for longer highway stretches, using adaptive cruise control can help maintain a consistent speed, reducing unnecessary acceleration and deceleration. While the AMG GT 63 S E Performance will never truly be an economy car, these practices can nudge its efficiency figures closer to the EPA estimates and beyond.