14 MPG combined. Let’s be blunt: that’s abysmal by nearly any modern metric. But for the 2019 Mercedes-Benz AMG G63, powered by its thunderous 4.0L 8-cylinder engine, it’s practically irrelevant. The G63 isn’t bought for its fuel sipping abilities; it’s purchased for its imposing presence, raw power, and undeniable off-road prowess. The buyer of this hand-built AMG machine understands and accepts the trade-off: performance and prestige over Prius-like efficiency.

City and highway performance

The EPA estimates peg the G63 at 13 MPG in the city and 15 MPG on the highway. While these numbers might induce range anxiety in a hybrid owner, they represent the reality of driving a nearly three-ton brick down the road. The city figure reflects the stop-and-go nature of urban driving, where the engine is constantly working to overcome the G63’s considerable weight. The highway MPG, while slightly better, is still constrained by the vehicle’s boxy aerodynamics. This isn’t a vehicle optimized for efficiency; it’s engineered for dominating any terrain and making a statement while doing it. The nine-speed automatic transmission tries to make the best of the V8’s power band, but ultimately cannot overcome the fundamental physics at play.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2019 Mercedes-Benz AMG G63 is a hefty $4,150. This figure is based on driving 15,000 miles per year, with fuel prices reflecting national averages. It’s a stark reminder that owning a G63 isn’t just about the initial purchase price; it’s also about the ongoing cost of feeding its prodigious appetite for premium gasoline. Potential buyers should carefully consider this expense when budgeting for ownership. You can easily calculate your own estimated fuel cost using current local fuel prices and your typical yearly mileage.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy can vary significantly depending on driving style and conditions. Aggressive acceleration, frequent off-roading, or extended idling will all contribute to lower MPG figures than those advertised. Conversely, a careful driver who anticipates traffic and uses smooth throttle inputs might see slightly improved numbers. However, even under ideal circumstances, expecting to drastically exceed the EPA estimates is unrealistic. The G63 is what it is: a powerful and imposing machine that prioritizes performance over frugality.

How it compares

Compared to its competitors, the G63 occupies a unique position. Consider the Land Rover Range Rover P525, which achieves around 16 MPG combined with its supercharged V8. Or the Cadillac Escalade, managing approximately 17 MPG on the highway with its V8. Even the more performance-oriented BMW X5 M fares a bit better, hovering around 15 MPG combined. The G63’s lower MPG isn’t just a matter of engine efficiency; it’s also a reflection of its distinctive design and off-road focus. While other luxury SUVs aim for a balance of comfort, performance, and efficiency, the G63 unapologetically prioritizes capability and presence. The G63 buyer isn’t cross-shopping for the best gas mileage; they are prioritizing the unique qualities that this particular vehicle offers, even at the expense of fuel economy. For all Mercedes Benz fuel economy data, visit the FuelEconomyHub homepage.

Tips to maximize efficiency

The most impactful way to improve fuel economy in the G63 is to adopt a more relaxed driving style. Avoid aggressive acceleration and hard braking, as these actions disproportionately impact fuel consumption due to the vehicle’s weight and powerful engine. Anticipate traffic flow and maintain a steady speed whenever possible.

Ensure that your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Regularly check your tire pressure and adjust as needed, especially during seasonal temperature changes.

Minimize idling time. Letting the engine run unnecessarily wastes fuel. If you anticipate being stationary for more than a minute or two, turn off the engine. The G63’s engine is designed so that restarting it won’t cause undue wear and tear.

Carefully consider accessory usage. Running the air conditioning or using power-hungry features like heated seats can impact fuel economy, particularly in city driving. Use these features carefully to minimize their effect on MPG figures. Understanding your AMG MPG across all years can also help.