14 MPG combined is not a typo. That’s the official EPA fuel economy rating for the 2020 Mercedes-Benz AMG G63, a hand-built, twin-turbocharged monument to excess that scoffs at the very notion of frugality. This isn’t a vehicle purchased by those who want to save at the pump. It is a statement, a declaration of power and presence, and frankly, nobody considering a G63 is losing sleep over fuel costs.

City and highway performance

The EPA breaks down the G63’s fuel consumption further, revealing a city rating of 13 MPG and a highway rating of 15 MPG. These figures are actually quite indicative of how this vehicle is used. The G63’s strong power, derived from its 4.0L V8 engine, necessitates constant throttle inputs even in urban environments. Its considerable weight and brick-like aerodynamics further conspire against efficient city driving. The slight improvement on the highway speaks to the engine’s ability to cruise at moderate speeds, but any attempt at spirited acceleration will send fuel consumption soaring.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2020 AMG G63 is $4,150. This figure is based on driving 15,000 miles per year, with a 45% city / 55% highway driving split, using the national average fuel prices at the time of calculation. This puts the G63 in a different league than most vehicles on the road. For context, that $4,150 would cover the annual fuel costs of some hybrid cars twice over. It’s a number that underscores the G63’s position as a luxury indulgence rather than a practical transportation solution.

Real-world expectations

While the EPA provides a baseline, real-world fuel economy in the G63 is heavily dependent on driving style. Those who frequently use the engine’s 577 horsepower and 627 lb-ft of torque will likely see numbers below the already-low EPA estimates. Conversely, a driver who consciously adopts a more relaxed driving style, avoiding hard acceleration and maintaining consistent speeds, might achieve figures closer to the EPA ratings. However, given the G63’s sheer mass and inherent inefficiency, any significant improvement is unlikely. Expect frequent trips to the gas station. It’s just part of the ownership experience.

How it compares

The G63 exists in a segment where practical considerations take a backseat to performance and prestige. Still, comparing its fuel economy to other high-performance SUVs puts its consumption into perspective. The Land Rover Range Rover Sport SVR, with its supercharged V8, manages a slightly better 16 MPG combined. The Porsche Cayenne Turbo, another performance-oriented SUV, achieves 17 MPG combined with its turbo V8. Even the Lamborghini Urus, a vehicle with supercar-rivaling performance, delivers a surprisingly similar 14 MPG combined. These slight differences hardly matter to the G63 buyer. They are purchasing an icon, and the cost of fueling it is simply part of the price of admission. Be sure to check all Mercedes Benz fuel economy data to compare with the rest of their lineup, as well as AMG MPG across all years to see changes in fuel economy as the models changed.

Tips to maximize efficiency

While extracting Prius-level fuel economy from a G63 is impossible, implementing certain driving habits can help minimize fuel consumption. Avoid aggressive acceleration and braking. The G63’s immense power is intoxicating, but each burst of acceleration comes at a significant cost in fuel. Gentle throttle inputs and anticipating traffic flow can reduce unnecessary fuel burn.

Maintain proper tire inflation. The G63 rides on large, performance-oriented tires. Ensuring they are inflated to the recommended pressure reduces rolling resistance, which translates to slightly improved fuel economy. Check the tire pressure regularly, especially during temperature changes.

Limit idling. The G63’s turbocharger system and large engine consume fuel even when stationary. Avoid prolonged idling, especially in situations where shutting off the engine is feasible and safe, such as waiting in parking lots or at long traffic lights.

Consider using a lighter touch on the accelerator pedal. While counterintuitive in a vehicle designed for rapid acceleration, a conscious effort to drive smoothly and avoid unnecessary bursts of speed can improve your fuel efficiency.