21 MPG combined isn’t going to win any fuel-sipping awards, but within the context of the 2021 Mercedes-Benz AMG C63, powered by a hand-built 4.0L V8, it’s almost beside the point. This car exists for a very specific type of buyer: the enthusiast who craves blistering performance, the guttural roar of a high-performance V8, and the prestige of the AMG badge. Fuel efficiency is undoubtedly lower on their priority list than track day lap times and the sheer thrill of acceleration.

City and highway performance

The EPA estimates of 17 MPG in the city and 26 MPG on the highway reveal the C63’s drinking habits. Its urban fuel consumption reflects the realities of stop-and-go traffic where the V8 is constantly pulling away from a standstill. The highway figure is more palatable, showcasing the engine’s ability to cruise efficiently at a constant speed, though even then, the temptation to tap into its strong power reserves will have a noticeable impact. Anyone who buys this vehicle expecting Prius-like fuel economy has fundamentally misunderstood its purpose. This is a high-performance machine with significant running costs, and the fuel economy is definitely one of them.

Annual fuel cost

According to EPA estimates, the annual fuel cost for the 2021 Mercedes-Benz AMG C63 is $2,750. This calculation is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that premium fuel is required for optimal performance, and the fluctuating cost of gasoline will significantly affect the actual amount spent. Drivers with a heavier foot or those who frequently drive in congested areas will likely see that figure climb even higher. For those considering purchasing this vehicle, it’s wise to factor in the expense of fuel alongside maintenance, insurance, and potential track day fees if they’re planning on unleashing the AMG’s full potential.

Real-world expectations

The official MPG figures are a useful benchmark, but real-world driving often tells a different story. Aggressive acceleration, frequent short trips, and spirited backroad blasts will all impact fuel consumption. Expect to see numbers closer to 15 MPG in the city if you tend to drive aggressively, and perhaps a little lower if you’re stuck in constant gridlock. Highway figures can reach the EPA estimate, but only with careful, consistent driving at moderate speeds. The AMG C63 is not a vehicle designed for maximizing MPG; its primary mission is performance, and enjoying that performance will inevitably lead to higher fuel consumption.

How it compares

Compared to its rivals, the AMG C63’s fuel economy is typical for its class. The BMW M3 Competition, with its inline-six engine, achieves a combined 19 MPG. The Audi RS5, using a turbocharged V6, manages a slightly better 21 MPG combined. These numbers aren’t likely to sway a buyer in this segment because they’re looking for specific performance characteristics, brand cachet, and driving feel. Anyone considering all Mercedes Benz fuel economy data is likely also cross-shopping with BMW, Audi, and sometimes even Cadillac, and the differences in MPG are likely secondary considerations. You can also check AMG MPG across all years for historical trends.

Tips to maximize efficiency

Smooth and steady acceleration is key. Avoid stomping on the accelerator and let the transmission shift smoothly. Anticipate traffic ahead of you and maintain a consistent speed whenever possible. Even small changes in driving habits can make a noticeable difference.

Ensure your tires are properly inflated. Under-inflated tires increase rolling resistance, forcing the engine to work harder and burn more fuel. Consult the sticker on your driver’s side doorjamb for the recommended tire pressure.

Reduce unnecessary weight in your vehicle. Excess cargo adds strain to the engine, negatively impacting fuel economy. Remove any items from your trunk or backseat that you don’t need on a daily basis.

Consider the drive mode. The AMG C63 offers various drive modes, including a Comfort mode designed for everyday driving. Use it! Aggressive modes will prioritize power delivery over fuel efficiency.

Regular maintenance is essential. Keep your engine properly tuned and change your oil and air filter according to the manufacturer’s recommendations. A well-maintained engine will run more efficiently.