21 MPG combined won’t win any fuel efficiency awards, but it’s the price you pay to own the 2024 Mercedes-Benz AMG GT 43 4matic Plus. This isn’t a car for everyone, especially not for those focused on stretching their fuel budget. It’s a statement car, a head-turner that blends performance and luxury. It requires premium fuel, and its owners are likely more concerned with the driving experience than the cost per mile.

City and highway performance

The EPA estimates the GT 43 4matic Plus gets 19 MPG in the city and 24 MPG on the highway. This difference reflects urban driving, where the engine’s power is used constantly to accelerate a fairly heavy car. The 9-speed automatic transmission tries to keep the engine in its most efficient range, but the car’s performance prevents it from prioritizing fuel sipping. The GT 43 performs well on the open road. Cruising at highway speeds allows the engine to relax, stretching a gallon of premium gasoline farther. You can achieve the 24 MPG highway figure with a light touch and by maintaining a consistent speed.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2024 Mercedes-Benz AMG GT 43 4matic Plus 3.0L 6-cyl to be $2,750. This is based on driving 15,000 miles per year, with 45% in the city and 55% on the highway. The calculation assumes national average fuel prices. If you live where gas is more expensive, expect this number to be higher. If you’re thinking about buying this car, remember it’s a premium one, and the fuel cost is part of the overall cost. Fuel cost isn’t the main concern for most buyers.

Real-world expectations

EPA estimates provide a baseline, but real-world fuel economy varies depending on driving habits, traffic, and even the weather. Drivers who accelerate quickly or frequently engage the AMG’s performance features will likely see lower MPG. Those who accelerate smoothly and maintain consistent speeds might achieve figures closer to the EPA estimates, or even slightly better. The type of driving also matters. Purely city driving will almost certainly result in lower figures than a mix of highway and suburban roads. The AMG GT 43 is rewarding to drive, and resisting the urge to tap into its performance is hard when trying to get good fuel economy.

How it compares

The 2024 AMG GT 43 is in the middle of the pack for fuel efficiency compared to other luxury performance cars. The Porsche Panamera, another sporty competitor, gets similar fuel economy at 19 MPG combined in its base trim. The BMW M850i, with significantly more horsepower, has similar fuel costs because its MPG is around 20 combined. Some competitors offer plug-in hybrid variants, like the Porsche Panamera 4 E-Hybrid. These significantly improve fuel efficiency, but at a higher initial cost and a different driving feel. For buyers of the AMG GT 43, the slightly lower fuel economy compared to some rivals is a tradeoff they’re often willing to make for the performance, style and status of the AMG badge. You can view all Mercedes Benz fuel economy data for reference. Consider also the AMG MPG across all years.

Tips to maximize efficiency

Drive smoothly and progressively. Avoid quick acceleration and hard braking. These reduce efficiency, especially in a performance car like the AMG GT 43. Anticipate traffic and maintain a steady pace when possible.

Make sure your tires are inflated properly. Low tires increase rolling resistance, which hurts fuel economy. Check your tire pressure regularly and inflate them to the recommended levels listed in your owner’s manual or on the sticker on the driver’s side door.

Don’t idle for long periods. Letting the engine run while stopped consumes fuel without going anywhere. If you’ll be stopped for over a minute, turn off the engine. Modern engines start fast, making this a simple way to save fuel.

Only use Sport+ or Race driving modes when you need them. These modes optimize the car for performance, but they also increase fuel consumption. Use Comfort or Eco mode for everyday driving to save fuel.

Keep up with scheduled maintenance. A well-maintained engine runs more efficiently. Follow the manufacturer’s maintenance schedule for oil changes, spark plugs, and other services to ensure performance and fuel economy. A faulty sensor or dirty air filter hurts fuel economy.