14 MPG combined. It’s a figure that elicits gasps from Prius owners and shrugs from those about to drop $170,000+ on a 2021 Mercedes-Benz AMG G63. This isn’t a vehicle purchased for its fuel efficiency; it’s a statement, an icon, a rolling, leather-lined display of engineering might. Serious performance and undeniable presence are valued over miles per gallon, and the target demographic knows it. They’re buying a twin-turbocharged symphony attached to a legend, not a fuel-efficient commute to Whole Foods.

City and highway performance

The EPA estimates 13 MPG in the city and 16 MPG on the highway for the AMG G63. These figures show a vehicle that, while undeniably potent, drinks deeply from the fuel tank. The G63’s boxy aerodynamics and hefty curb weight (around 5,800 pounds) work against any attempts at efficiency.

Stop-and-go city driving, with its constant acceleration and braking, is where the G63’s fuel consumption is most pronounced. Out on the open road, at a steady cruising speed, the highway MPG figure offers a slight improvement, but still falls far short of what one might expect from a modern luxury SUV.

Annual fuel cost

Considering those city and highway MPG numbers, the EPA calculates an annual fuel cost of $4,150 for the 2021 Mercedes-Benz AMG G63. This figure is based on driving 15,000 miles per year, with a specified percentage allocated to city versus highway driving. The calculation also uses national average fuel prices, which fluctuate, meaning the actual cost could be higher or lower depending on where you live and how much you drive.

For perspective, that’s well over three times the annual fuel cost of a modern compact car. If you’re considering an AMG G63, you’re likely less concerned with the cost of gasoline. Check out all Mercedes Benz fuel economy data here.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the AMG G63 often deviates from these figures. Aggressive driving, common with a vehicle possessing this level of performance, will significantly reduce MPG. Short trips around town, especially in colder weather, will also negatively impact fuel efficiency. Owners who frequently use the G63’s off-road capabilities can also anticipate even thirstier consumption.

It’s more prudent to anticipate a lower MPG number in daily use. The 4.0L twin-turbo V8 making 577 horsepower is intoxicating, and it’s only natural to exploit that level of power.

How it compares

The AMG G63 operates in a rarefied segment, but even among high-performance SUVs, its fuel economy stands out. The BMW X5 M, for example, with its powerful twin-turbo V8, achieves an EPA-estimated 15 MPG combined. The Land Rover Range Rover Sport SVR, another contender in the luxury performance SUV arena, also achieves around 15 MPG combined. The Cadillac Escalade with the 6.2L V8, which offers comparable space and luxury even though it’s considerably less expensive, manages closer to 17 MPG combined.

The G63 buyer prioritizes its distinctive styling, reliable off-road capability, and the sheer prestige of the badge. For these customers, the slightly worse fuel consumption is often simply a cost of doing business and obtaining this iconic vehicle. You can also investigate AMG MPG across all years if this specific model doesn’t fit your plans.

Tips to maximize efficiency

While the AMG G63 wasn’t designed for fuel efficiency, there are still steps owners can take to subtly improve MPG. Avoid aggressive acceleration and hard braking. The G63’s immense power is readily available, but using it carefully will conserve fuel.

Anticipate traffic flow and maintain a steady speed whenever possible.

Ensure proper tire inflation. The correct tire pressure minimizes rolling resistance, a key factor in fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended levels, found on the doorjamb.

Minimize unnecessary weight. The G63 is already a heavy vehicle, so avoid carrying extra cargo that adds to the load. Removing unnecessary items from the cargo area can yield a small but measurable improvement in fuel economy.

Consider using premium fuel, as recommended by Mercedes-Benz. While not directly improving fuel economy, using the correct fuel grade ensures optimal engine performance, which can help maintain the vehicle’s efficiency over the long term.

Keep up with scheduled maintenance. A well-maintained engine runs more efficiently. Regular oil changes, air filter replacements, and spark plug inspections can all contribute to better fuel economy.