The 2023 Mercedes-Benz AMG GLS63 4matic Plus achieves 16 MPG combined. This vehicle isn’t about frugality; it’s about performance and luxury, which often takes precedence over fuel consumption. The typical AMG GLS63 buyer prioritizes acceleration, a handcrafted interior, and the presence that a high-performance, three-row SUV delivers. This is a vehicle bought because the owner can afford it, not for its gas mileage.

City and highway performance

The EPA estimates 14 MPG in the city and 19 MPG on the highway. The city figure reflects stop-and-go traffic, where the GLS63’s 4.0L twin-turbo V8 constantly fights its own weight and power. The highway MPG improves, but not dramatically. Even with the AMG Speedshift TCT 9-speed transmission, the engine is always ready to unleash its power, impacting fuel economy. You can consider 19 MPG on the highway a best-case scenario, achievable only with a light foot and disciplined driving.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2023 Mercedes-Benz AMG GLS63 4matic Plus at $3,600. This figure is based on driving 15,000 miles per year and using the national average fuel price for premium gasoline. This is a significant amount, placing the GLS63 among the thirstiest vehicles. Buyers considering this SUV should factor this cost into their overall budget and recognize that it’s a recurring expense tied to the pleasure of driving such a potent machine.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy for the AMG GLS63 can vary considerably. Aggressive driving, frequent short trips, and heavy traffic will all push the MPG figures lower. Expect to see numbers consistently below the EPA estimates if you regularly exploit the engine’s performance. Conversely, longer highway journeys with a focus on maintaining a steady speed might yield figures closer to, or even slightly above, 19 MPG.

Achieving the EPA numbers consistently requires a mindful and restrained driving style, contradicting the very nature of this AMG.

How it compares

In the realm of high-performance, three-row SUVs, fuel economy is rarely a selling point, but comparisons are inevitable. The BMW X7 M60i, for example, delivers a combined 18 MPG with its twin-turbo V8, a slight edge over the AMG GLS63. The Land Rover Range Rover Sport P530 First Edition, while luxurious and powerful, achieves a similar 16 MPG combined. Even the Porsche Cayenne Turbo S E-Hybrid, despite its plug-in hybrid technology, only manages a combined 18 MPG when factoring in gasoline consumption. These fractional differences rarely sway the buying decision, as the AMG GLS63’s appeal lies more in its brand identity and driving experience, information you can find in AMG MPG across all years.

Tips to maximize efficiency

While squeezing every last drop of fuel from the AMG GLS63 might seem contradictory to its purpose, there are steps you can take to improve efficiency. Avoid aggressive acceleration and hard braking. The less you dip into the engine’s reserves, the less fuel you’ll consume. Anticipate traffic flow and maintain a consistent speed whenever possible.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and burn more fuel. Check your tire pressure regularly and inflate them to the manufacturer’s recommended specifications. This small adjustment can make a noticeable difference over time.

Use the AMG’s driving modes judiciously. While Sport and Sport+ modes enhance performance, they also prioritize power delivery over efficiency. Choose Comfort mode during everyday driving to optimize fuel consumption without sacrificing too much performance. The Mercedes Benz brand has a wide variety of vehicles for sale, check out all Mercedes Benz fuel economy data.

Minimize idling. Letting the engine idle for extended periods wastes fuel. If you’re stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, making this a simple way to conserve fuel, especially in urban environments.

Finally, remove any unnecessary weight. Excess cargo adds to the vehicle’s weight, which reduces fuel efficiency. Clear out any items you don’t need to carry around, particularly heavy objects. A lighter vehicle requires less energy to accelerate and maintain speed.