20 MPG combined from a hand-built, twin-turbocharged 4.0L V8 powering all four wheels might seem at odds with modern efficiency standards. But the 2019 Mercedes-Benz AMG S63 4matic Coupe isn’t about frugality; it’s about raw, unapologetic performance wrapped in exquisite luxury. This MPG figure is the price of admission for experiencing one of the most potent and refined grand tourers on the road. This isn’t a car bought for its fuel sipping abilities; it’s bought for its ability to effortlessly conquer continents while coddling its occupants.

City and highway performance

The EPA estimates the AMG S63 Coupe achieves 17 MPG in the city and 27 MPG on the highway. These figures reflect the car’s dual nature. In urban environments, the stop-and-go traffic and the temptation to unleash the V8’s immediate torque invariably drag down fuel consumption. The engine’s strong character also comes into play, making it consume fuel even when idling. But out on the open road, where the 9-speed automatic transmission can settle into its higher gears and the engine operates at lower RPMs, the S63 demonstrates surprising highway efficiency for a car of its immense power. The key is a light foot and a willingness to resist the urge to exploit the engine’s capabilities.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz AMG S63 Coupe at $2,900. This calculation is based on driving 15,000 miles per year and using the national average fuel price for premium gasoline (the S63 demands the good stuff). Of course, actual fuel costs will vary depending on individual driving habits, local fuel prices, and the proportion of city versus highway driving. Aggressive driving or prolonged idling will easily push that figure higher, while a predominantly highway commute with gentle throttle inputs might bring it down slightly. But for potential AMG S63 owners, this $2,900 estimate is unlikely to be a major deterrent.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy can differ significantly. Expect the 20 MPG combined figure to be optimistic for many AMG S63 owners. If the car is primarily used for short trips around town or spirited weekend drives, achieving the EPA’s combined figure is unlikely. More realistic expectations would be mid-teens in the city and low-to-mid 20s on the highway, perhaps even lower if you’re constantly tapping into the engine’s reserves. However, those who use it primarily for cross-country travel may see numbers closer to the EPA estimates.

How it compares

In the rarefied world of high-performance coupes, fuel economy isn’t usually a primary concern, but comparisons are inevitable. The BMW M8 Competition Coupe, for example, achieves an EPA-estimated 17 MPG city and 24 MPG highway, similar to the S63, reflecting the inherent compromise between power and efficiency in this class. The Porsche 911 Turbo S, with its smaller but equally potent engine, manages a slightly better 15 MPG city and 20 MPG highway, showing that weight and engine displacement can play a role. Even all all Mercedes Benz fuel economy data pales in comparison! Ultimately, those gravitating toward the AMG MPG across all years are willing to accept a certain level of fuel consumption in exchange for the performance and luxury that defines the car.

Tips to maximize efficiency

While the AMG S63 Coupe isn’t designed for outright fuel efficiency, there are strategies to minimize fuel consumption without sacrificing driving enjoyment. Gentle acceleration and smooth braking can make a noticeable difference, especially in city driving. Avoid aggressive throttle inputs and anticipate traffic flow to minimize unnecessary stops and starts.

Use the car’s driving modes. The “Comfort” or “Eco” setting, if equipped, will optimize the engine and transmission for efficiency, reducing throttle response and promoting earlier upshifts. These modes are ideal for cruising on the highway or navigating congested city streets.

Ensure that the tires are properly inflated. Underinflated tires increase rolling resistance, which can negatively impact fuel economy. Check the tire pressure regularly and maintain it at the recommended level specified on the doorjamb sticker.

Reduce unnecessary weight. Remove any heavy items from the trunk or rear seats, as excess weight increases the engine’s workload and fuel consumption. While this might seem insignificant, small gains can add up over time.

Service the vehicle on time. Regular maintenance, including oil changes, air filter replacements, and spark plug replacements, ensures that the engine is running optimally and efficiently. A well-maintained engine consumes less fuel.