14 MPG combined is what anyone considering the 2023 Mercedes-Benz AMG G63 will get, a figure that will likely send shivers down the spines of Prius owners. But let’s be clear: buyers of this hand-built, twin-turbocharged brute aren’t cross-shopping with hypermilers. The G63 is a statement piece, an anachronism, a middle finger to the sensible. It exists for those who want a vehicle that can crawl over boulders one minute and announce their arrival at a black-tie gala the next. Fuel efficiency is, to put it mildly, a secondary concern.

City and highway performance

Don’t expect wildly differing figures between city and highway driving. The EPA estimates 13 MPG in the city and 16 MPG on the highway. The discrepancy is less pronounced than in other vehicles because of the G63’s inherent aerodynamic disadvantages and the ever-present temptation to tap into the 577 horsepower on offer. In stop-and-go traffic, the weight and powerful engine conspire against efficiency, while on the highway, the brick-like shape battles wind resistance. You’ll become intimately familiar with your local gas station.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Mercedes-Benz AMG G63 at $4,150. This figure is calculated based on driving 15,000 miles per year and using national average fuel prices. Given the G63’s thirst for premium gasoline, and the likelihood that many owners will exceed the 15,000-mile benchmark, expect to potentially spend significantly more. Consider this operating cost part of the overall price of admission to the G63 club.

Real-world expectations

While the EPA estimates provide a baseline, real-world MPG for the AMG G63 is highly dependent on driving style. Frequent, enthusiastic use of the accelerator will plummet fuel economy into the single digits. Owners who spend more time navigating congested city streets or indulging in off-road adventures can also expect significantly reduced MPG. Conversely, those who primarily use the G63 for longer highway cruises, and exercise restraint with the throttle, might approach the EPA’s 16 MPG estimate, but exceeding it is unlikely.

How it compares

The G63’s fuel economy stands in stark contrast to other SUVs, even within the luxury segment. The Land Rover Range Rover P400, for example, achieves a combined 21 MPG. The BMW X5 M, while also performance-oriented, manages around 16 MPG combined. Even the Cadillac Escalade, a large SUV, typically gets around 16 MPG combined. These distinctions matter less to the G63 buyer. Someone choosing between a Range Rover and a G63 is considering vastly different statements and capabilities. The G63 buyer prioritizes exclusivity, off-road prowess, and a distinct, unapologetic presence above all else, fuel efficiency considerations are secondary.

Tips to maximize efficiency

Understand that maximizing fuel efficiency in a G63 is a relative concept. However, some strategies can help mitigate the financial pain at the pump. Avoid aggressive acceleration and braking. The G63’s immense power is intoxicating, but try to resist the urge to unleash it at every opportunity. Gentle acceleration and anticipation of traffic flow can noticeably improve fuel economy.

Ensure your tires are properly inflated. Under-inflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Refer to the sticker on the driver’s side doorjamb for the recommended tire pressure and check them regularly.

Minimize idling. Letting the G63 idle for extended periods, especially while the engine is cold, wastes fuel unnecessarily. If you anticipate being stationary for more than a minute, consider turning off the engine. The auto start/stop feature can help with this, but some owners choose to disable it due to personal preference.

Be mindful of cargo and accessories. Excess weight and aerodynamic drag impact fuel economy. Remove any unnecessary items from the vehicle and consider the impact of aftermarket accessories like roof racks or oversized tires. The G63’s already compromised aerodynamics are further worsened by these additions.

Consider using the “Comfort” driving mode when possible. While this mode won’t transform the G63 into a fuel sipper, it does tone down throttle response and shift points, encouraging a more relaxed driving style. This can yield incremental improvements in fuel economy, especially during highway cruising. For all Mercedes Benz fuel economy data, you can browse our data explorer. You can also review AMG MPG across all years. The G63 is a unique blend of luxury and ruggedness; efficiency is simply not part of its core mission.