11 MPG combined. Let’s be brutally honest: if you’re even remotely concerned about the fuel consumption of the 2023 Mercedes-Benz AMG G 63 4×4 Squared, you’re fundamentally misunderstanding its purpose. This isn’t transportation; it’s a statement. It’s ostentatious excess manifested in a hand-built, portal-axle-equipped off-road colossus powered by a twin-turbocharged V8. The target demographic for this vehicle isn’t cross-shopping with RAV4 Primes. They’re buying presence, capability beyond reason, and the bragging rights that come with owning a vehicle as unapologetically extravagant as this one.

City and highway performance

The EPA estimates for the AMG G 63 4×4 Squared are stark: 10 MPG in the city and 12 MPG on the highway. These figures reflect the immense weight, aggressive aerodynamics (or lack thereof), and constant power demands of the AMG-tuned 4.0L V8 engine. The 9-speed automatic transmission attempts to mitigate the fuel penalty, but ultimately, physics prevails. Short trips around town will be particularly punishing, as the engine and drivetrain require significant energy to overcome inertia, while highway cruising suffers from the large frontal area and knobby off-road tires creating substantial drag.

Annual fuel cost

Prepare for some sticker shock at the pump. The EPA estimates the annual fuel cost for the 2023 Mercedes-Benz AMG G 63 4×4 Squared at $5,250. This figure is based on driving 15,000 miles per year, using the EPA’s fuel economy estimates and assuming national average fuel prices. In reality, given the typical driving patterns of G 63 owners (often shorter trips and more frequent idling), and the likelihood of them using premium fuel, the actual cost could easily exceed this estimate. While some find these numbers frightening, those shopping for this G-Wagen variant already understand the financial cost of admission is quite high. This purchase isn’t about saving money.

Real-world expectations

Consider the EPA estimates as a best-case scenario under controlled conditions. Real-world fuel economy will almost certainly be lower, particularly if you engage in spirited driving, frequent off-roading, or live in an area with heavy traffic congestion. The G 63’s prodigious power output and intoxicating exhaust note are undeniably addictive, tempting drivers to dip into the throttle frequently, further eroding fuel efficiency. Factor in the weight of aftermarket modifications, such as winches, roof racks, and auxiliary lighting, and fuel consumption will only worsen. Ultimately, the real-world MPG will depend heavily on individual driving habits and the typical use of the vehicle.

How it compares

The fuel economy of the AMG G 63 4×4 Squared is predictably dismal compared to other SUVs. For example, a comparably-priced Range Rover Autobiography with the V8 manages around 18 MPG combined. Even the standard AMG G 63, without the portal axles and extreme off-road modifications, achieves a slightly better 13 MPG combined. A Lamborghini Urus, while still thirsty, achieves 14 MPG combined. These comparisons, however, are somewhat irrelevant. The 4×4 Squared isn’t bought for its efficiency. It’s purchased for its unique combination of luxury, off-road prowess, and head-turning presence, attributes for which buyers are willing to sacrifice fuel economy.

Tips to maximize efficiency

Despite the inherently poor gas mileage, there are a few strategies owners could employ to eke out marginal improvements. Gentle acceleration and consistent speeds are beneficial, minimizing the engine’s workload. Avoid aggressive launches and hard braking, which waste fuel converting energy into heat, or excessive tire wear.

Proper tire inflation is important for reducing rolling resistance and optimizing fuel economy. Consult the vehicle’s tire pressure placard and maintain the recommended pressure levels. While the knobby off-road tires prioritize grip on loose surfaces, they also create significant drag on pavement, so monitoring inflation and maintaining appropriate pressure can certainly help to ensure longer tire life, performance and fuel economy.

Avoid unnecessary idling. The AMG G 63 4×4 Squared consumes a considerable amount of fuel when stationary with the engine running. If you anticipate being stopped for more than a minute, shut off the engine to conserve fuel. You may be surprised how much these little changes positively affect your wallet.

Ensure that the vehicle is properly maintained, including regular oil changes, air filter replacements, and spark plug inspections. A well-maintained engine operates more efficiently, maximizing fuel economy and minimizing emissions. Always follow your scheduled maintenance, according to your owner’s manual.

Consider the weight of your cargo. The heavier the vehicle, the more fuel it consumes. Remove any unnecessary items from the vehicle to reduce weight and improve fuel economy. While the effect may be minor, every little bit helps, especially when starting from such a low baseline.