13 MPG combined. That’s the stark reality for anyone considering the 2017 Mercedes-Benz AMG G63 with the 5.5L V8. But let’s be honest: prospective G63 buyers aren’t exactly cross-shopping with Prius owners. This is a rolling statement, a vehicle purchased to dominate both on and off the road. Fuel economy, in this context, is secondary to its imposing presence, hand-built engine, and legendary capabilities. It’s a price paid for an experience unlike any other.

City and highway performance

The EPA estimates of 12 MPG in the city and 14 MPG on the highway paint a clear picture: this is not a vehicle designed for efficiency. The city figure reflects the constant stop-and-go, the heavy throttle inputs needed to get its considerable mass moving, and its brick-like shape battling urban winds. Even on the open road, the relatively low highway MPG compared to other vehicles highlights the G63’s engineering priorities. It’s geared for effortless cruising and immediate power delivery at any speed, not for minimizing fuel consumption.

Annual fuel cost

Prepare for a large fuel bill. The EPA estimates an annual fuel cost of $4,450, a figure reached assuming 15,000 miles of driving per year and current national average fuel prices for premium gasoline, which the G63 demands. This number is a realistic expectation of what you’ll be spending to keep this beast fed. Factor in that cost, along with insurance, maintenance, and other expenses, when considering long-term ownership.

Real-world expectations

While the EPA numbers provide a baseline, real-world MPG can vary considerably. Aggressive driving, frequent off-roading, or even prolonged idling will undoubtedly drag the numbers down, perhaps even below 10 MPG. Conversely, a careful driver sticking to steady highway speeds might see figures closer to the EPA estimate, but expecting to consistently exceed 14 MPG is unrealistic. The G63 rewards a heavy foot with thrilling acceleration but penalizes it severely at the pump.

How it compares

The 2017 AMG G63 exists in a rarefied space, but comparisons are still inevitable. A similarly powerful Land Rover Range Rover Supercharged manages a slightly better 16 MPG combined. Even Cadillac’s Escalade, which uses a large V8, achieves around 17 MPG combined. While those numbers might seem better, the G63 offers a unique combination of off-road prowess, handcrafted details, and head-turning style that neither the Range Rover nor the Escalade can fully match. Those seeking better gas mileage might consider the Mercedes-Benz GLE, and you can view all Mercedes Benz fuel economy data on our site. For those specifically seeking AMG performance, you can compare AMG MPG across all years if you prefer a different model.

Tips to maximize efficiency

While “efficiency” and “G63” might seem mutually exclusive, there are small steps you can take. The 5.5L V8 responds predictably to throttle input, so driving smoothly and anticipating traffic flow can minimize wasteful acceleration and braking. Avoid aggressive starts, especially when the engine is cold, as this burns excessive fuel.

Ensure the tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. Check the recommended tire pressure regularly and maintain it accordingly.

Minimize idling. The G63’s engine burns a surprising amount of fuel at idle. If you’re waiting for more than a minute or two, turn off the engine rather than letting it run needlessly.

While tempting, avoid unnecessary off-road excursions unless genuinely required. The G63’s four-wheel-drive system and aggressive tires offer exceptional grip on loose surfaces, but they also contribute to increased fuel consumption compared to on-road driving.

Consider using cruise control on the highway. Maintaining a consistent speed helps reduce unnecessary acceleration and deceleration, leading to improved fuel economy. Be mindful of hills and traffic conditions, and adjust your speed accordingly to avoid excessive strain on the engine.