13 MPG combined. Accept it, embrace it, or buy something else. No one shopping for the 2015 Mercedes-Benz G63 AMG is prioritizing fuel efficiency, and that’s absolutely fine. This isn’t a car for commuting or grocery runs; it’s a statement. It’s for those who want a brutally powerful, unapologetically ostentatious off-roader that just happens to be dripping in luxury. This is a vehicle purchased for its presence and capability, and the fuel bill is simply the cost of entry to that exclusive club.

City and highway performance

The EPA estimates the 2015 G63 AMG at 12 MPG in the city and 14 MPG on the highway. Those numbers reflect the inherent challenges of moving a vehicle with the aerodynamic profile of a brick, coupled with a hefty curb weight and a prodigious thirst for premium gasoline. The 5.5-liter twin-turbo V8 requires significant fuel to deliver its impressive performance. The seven-speed automatic transmission does its best to manage the power and keep the engine in its most efficient range, but ultimately it’s fighting a losing battle against physics. Don’t expect to see much deviation from these figures unless you’re particularly light-footed (highly unlikely) or spend most of your time parked.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2015 Mercedes-Benz G63 AMG at precisely $4,450. This figure is based on driving 15,000 miles per year, with 45% of those miles driven in the city and 55% on the highway, using national average fuel prices at the time of calculation. Of course, your actual fuel costs may vary depending on your driving habits, fuel prices in your area, and the specific blend of gasoline you use. Given the G63’s penchant for premium fuel and its predictably heavy usage patterns, it’s safe to assume that many owners will exceed this estimate. For a complete view of all Mercedes Benz fuel economy data, explore our website.

Real-world expectations

While the EPA provides a standardized estimate, real-world fuel economy for the G63 AMG is heavily dependent on driving style. Aggressive acceleration and frequent off-road excursions will quickly send your MPG tumbling below the ratings. Conversely, consistent highway cruising at moderate speeds might yield slightly better results, but don’t expect miracles. Plan your fuel stops accordingly, because with fuel economy this low, you’re going to be visiting gas stations frequently. For additional model-specific information, view G63 MPG across all years.

How it compares

The G63 AMG exists in a unique space, with few direct competitors. The Land Rover Range Rover Supercharged, another luxurious and capable off-roader, achieves a slightly better 16 MPG combined with its supercharged V8. A Porsche Cayenne Turbo S, focused more on on-road performance, manages around 17 MPG combined. These alternatives offer similar levels of performance and luxury while being slightly more fuel-efficient, but they lack the G63’s distinctive, boxy silhouette and undeniable road presence. The Jeep Grand Cherokee Trackhawk, with its Hellcat engine, provides comparable power but similar dismal fuel economy around 13 MPG combined, appealing to a different buyer seeking straight-line speed above all else. Those considering the G63 aren’t cross-shopping purely on MPG; they’re buying a specific image and experience.

Tips to maximize efficiency

While maximizing fuel efficiency might not be the primary goal for a G63 AMG owner, a few adjustments can help to minimize fuel consumption. Avoid aggressive acceleration and hard braking, as these maneuvers put a significant strain on the engine and drivetrain, leading to increased fuel usage. Gentle and progressive throttle inputs are key.

Ensure your tires are properly inflated. The G63’s large tires require consistent monitoring. Maintaining the correct pressure reduces rolling resistance, contributing to marginally better fuel economy and improved tire life. Check your owner’s manual for the recommended tire pressure.

Reduce unnecessary weight. Carrying excessive cargo adds to the vehicle’s overall weight, forcing the engine to work harder. Remove any items you don’t need from the cargo area to improve fuel efficiency; every little bit helps.

Service the engine according to the manufacturer’s recommendations. Regular maintenance, including oil changes and air filter replacements, ensures the engine is running optimally. A well-maintained engine is a more efficient engine.