20 MPG combined isn’t a figure that keeps Mercedes-Benz AMG S63 buyers awake at night. Let’s be frank: if fuel efficiency were a high priority, they’d be shopping for a different vehicle entirely. This is a hand-built performance machine, designed for blistering acceleration and composed high-speed cruising. The S63 buyer prioritizes power, luxury, and exclusivity above all else, and accepts the fuel consumption as a necessary trade-off for the immense performance on tap.

City and highway performance

The EPA estimates the 2019 Mercedes-Benz AMG S63 4matic at 17 MPG in the city and 26 MPG on the highway. These numbers reflect the demands placed on the 4.0L twin-turbocharged V8, which churns out 603 horsepower and 664 lb-ft of torque. In urban environments, stop-and-go traffic and frequent acceleration inevitably lead to lower fuel economy. The higher highway MPG suggests that the S63 is more efficient when cruising at a steady speed, benefiting from its advanced nine-speed automatic transmission and cylinder deactivation system which shuts down cylinders under light load.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz AMG S63 4matic at $2,900. This figure is based on driving 15,000 miles per year and using national average fuel prices for premium gasoline, which this vehicle requires. Keep in mind that actual fuel costs can vary considerably depending on individual driving habits, local fuel prices, and the percentage of city versus highway driving. Drivers with a heavier foot or those who primarily drive in congested urban areas can expect to pay more than the EPA estimate.

Real-world expectations

While the EPA provides a standardized measure for comparison, real-world fuel economy for the AMG S63 often deviates. Spirited driving, which is almost unavoidable in a car with this level of performance, will significantly reduce MPG. Owners who frequently exploit the car’s acceleration or engage in track days will likely see figures well below the EPA estimates. Conversely, gentle driving on long highway stretches might yield slightly better results. Ultimately, the driver’s style and the conditions in which the vehicle is operated have a major impact on fuel consumption. The all Mercedes Benz fuel economy data shows similar variances across their lineup.

How it compares

In the realm of high-performance luxury sedans, the AMG S63’s fuel economy is roughly comparable to its rivals. The BMW M5 Competition, with its 617-horsepower twin-turbo V8, achieves an EPA-estimated 17 MPG city and 24 MPG highway. The Porsche Panamera Turbo, offering similar levels of performance and luxury, is rated at 18 MPG city and 24 MPG highway. These slight differences in MPG are often overshadowed by other factors that influence buyers, such as brand loyalty, styling preferences, and performance characteristics. Owners interested in AMG MPG across all years will see how the S63 stacks up against other models in the performance division.

Tips to maximize efficiency

While fuel economy might not be the primary concern for AMG S63 owners, there are ways to optimize efficiency without sacrificing performance. First, practice smooth acceleration and avoid unnecessary hard braking. The S63’s immense torque allows for effortless acceleration even with moderate throttle input, minimizing fuel consumption.

Take advantage of the car’s driving modes. Selecting “Comfort” or “Eco” mode will soften throttle response, optimize shift points, and potentially activate cylinder deactivation more frequently, all contributing to improved fuel economy during less spirited driving.

Ensure that the tires are properly inflated. Underinflated tires increase rolling resistance, requiring the engine to work harder and consume more fuel. Regularly check tire pressures and maintain them at the recommended levels specified by Mercedes-Benz.

Minimize idling. Letting the engine idle for extended periods, such as in stop-and-go traffic or while waiting, wastes fuel. If the situation allows, turning off the engine can save a noticeable amount of gasoline over time. The S63’s engine is engineered to restart quickly and smoothly, so there’s little inconvenience.

Consider using cruise control on long highway drives. Maintaining a consistent speed can significantly improve fuel economy compared to constantly varying the throttle position. The AMG S63’s advanced cruise control systems further enhance efficiency by automatically adjusting speed to maintain a safe following distance.