14 MPG combined may deter many car buyers, but for the owner of a 2019 Mercedes-Benz G550, it’s part of the experience. It’s not just transportation; it’s a statement. It’s a mobile vault of chrome, leather, and unwavering capability, designed to take on both Rodeo Drive and the Rubicon Trail, though with frequent stops at the gas pump. The G550 buyer values presence and raw power over practicality, and they are willing to pay for it.

City and highway performance

The EPA estimates 13 MPG in the city and 17 MPG on the highway for the 2019 G550. These figures reflect the vehicle’s boxy shape and permanent four-wheel-drive system. The nine-speed automatic transmission tries to optimize fuel efficiency but, the G550’s weight and the strong power of its 4.0-liter twin-turbo V8 (producing 416 horsepower and 450 lb-ft of torque) inevitably decrease fuel economy. In stop-and-go traffic, expect the G550 to drain the fuel tank quickly. Highway driving, while slightly better, still requires planning refueling stops on longer trips.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2019 Mercedes-Benz G550 at $4,150. This is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway. The calculation uses the national average fuel price at the time of the EPA’s testing. Rising fuel costs will increase this annual estimate. For a vehicle like the G550, fuel costs are a small consideration within the overall ownership experience. The vehicle’s initial price, insurance premiums, and maintenance expenses are more costly than gasoline for the typical owner.

Real-world expectations

EPA estimates are a baseline, but real-world G550 MPG figures can vary based on driving style, terrain, and environment. Aggressive acceleration, frequent off-roading, and driving in hilly areas will negatively impact fuel economy. Cold weather and winter tires can also reduce efficiency. Most G550 owners shouldn’t expect to match the EPA’s highway estimate if they often drive using the vehicle’s capabilities. The G550 invites drivers to enjoy its power, and resisting that urge is hard for many.

How it compares

With 2019 G550 fuel economy, it ranks at the bottom of the luxury SUV segment. A similar Land Rover Range Rover with the supercharged V6 gets around 19 MPG combined, while a BMW X5 xDrive50i, with its turbocharged V8, achieves about 18 MPG combined. Even the Cadillac Escalade can achieve slightly better fuel economy, around 17 MPG combined in its 4WD configuration. For those considering the G-Wagen, fuel economy is often less important than its off-road capabilities and iconic design. To see all Mercedes Benz fuel economy data, you can compare the G550 to other models. You can also see G550 MPG across all years.

Tips to maximize efficiency

The G550 will never get great gas mileage, but owners can take steps to lessen the fuel costs. Gentle acceleration and consistent speeds are key. Avoid aggressive driving habits and unnecessary idling, as these will quickly deplete the fuel tank.

Tire pressure is important in fuel efficiency. Ensure that tires are inflated to the recommended pressure, which is on the driver’s side doorjamb. Underinflated tires increase rolling resistance, leading to reduced fuel economy. Check tire pressure regularly during weather changes.

The G550 is very capable off-road, using four-wheel drive only when needed can save fuel. Engaging four-wheel drive on dry pavement increases drivetrain friction, lowering efficiency. When driving on paved roads, keep the G550 in two-wheel drive mode.

Regular maintenance, including oil changes and air filter replacements, is important for engine performance. A well-maintained engine runs more efficiently, improving fuel economy. Follow the manufacturer’s recommended maintenance schedule to keep the G550 in top condition.