21 MPG combined from the 2019 Mercedes-Benz AMG C63 isn’t going to win any hypermiling contests, but let’s be honest: nobody buys this car for its fuel efficiency. This is a snarling, tire-shredding, V8-powered performance machine draped in a (relatively) subtle Mercedes-Benz suit. The fuel economy is simply the price you pay to enter a very exclusive club of driving thrills.

City and highway performance

The EPA estimates the AMG C63 will achieve 18 MPG in the city and 27 MPG on the highway. While these are EPA estimates, they do reflect a realistic expectation for mixed driving.

The city figure will plummet if you’re constantly exploiting the engine’s prodigious power, and the highway number will suffer if you’re consistently driving at extra-legal speeds. However, the 9-speed automatic transmission does help keep the revs down on the open road, contributing to that 27 MPG figure. The C63 isn’t a light car, and its engine’s appetite will always be a factor, but Mercedes has done a decent job of balancing performance and usability.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Mercedes-Benz AMG C63 at $2,750. This figure is based on driving 15,000 miles per year and using national average fuel prices. Keep in mind that this estimate is highly dependent on driving habits and local fuel prices. Someone who primarily drives in congested city traffic and enjoys frequent acceleration will likely exceed this estimate, while someone who does mostly highway driving and has a lighter foot might come in slightly below.

Premium fuel is required to unlock the engine’s performance and efficiency, so make sure to factor higher fuel costs into your budget.

Real-world expectations

While the EPA estimates provide a baseline, real-world fuel economy for the AMG C63 will vary significantly depending on driving style and conditions. Drivers who frequently engage in spirited driving, track days, or aggressive acceleration should realistically expect to see fuel economy figures below the EPA estimates. Conversely, drivers who prioritize smooth acceleration, anticipate traffic, and generally drive conservatively might see numbers closer to, or even slightly above, the EPA estimates.

Remember that the AMG C63 weighs over 4,000 pounds, and the 4.0L V8 is always eager to flex its muscles. Consistent fuel efficiency requires conscious effort and a degree of restraint.

How it compares

Compared to its rivals, the 2019 AMG C63’s fuel economy sits squarely in the middle of the pack for high-performance sedans. The BMW M3 CS, for example, achieves a combined 19 MPG with a 3.0L inline-6 engine, while the Alfa Romeo Giulia Quadrifoglio, with its 2.9L twin-turbo V6, manages a slightly better 20 MPG combined. However, the Cadillac ATS-V, with its 3.6L twin-turbo V6, achieves a nearly identical 21 MPG combined.

These differences don’t really matter for most buyers in this segment; those considering a car like the AMG C63 are primarily focused on performance and driving experience, and small variations in fuel economy are unlikely to be a deal-breaker. Serious shoppers should always consult all Mercedes Benz fuel economy data, and consider AMG MPG across all years before making a final decision.

Tips to maximize efficiency

Resist the urge to constantly exploit the engine’s power. Frequent hard acceleration will dramatically reduce fuel economy. Smooth, gradual acceleration and anticipating traffic flow will help to minimize fuel consumption.

Use the car’s driving modes. The AMG C63 typically offers “Comfort” or “Eco” modes that prioritize fuel efficiency by adjusting throttle response, transmission shift points, and other vehicle parameters. These modes can significantly improve fuel economy in everyday driving, especially in stop-and-go traffic. You paid for the power, but you don’t have use it all the time.

Ensure proper tire inflation. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended specifications, which can typically be found on a sticker inside the driver’s side doorjamb.

Reduce unnecessary weight. Carrying excess weight in the vehicle increases fuel consumption. Remove any unnecessary items from the trunk and passenger compartment to improve fuel economy, especially if you plan to track the car.

Regular maintenance is critical. A properly maintained engine will run more efficiently. Follow the manufacturer’s recommended maintenance schedule, including regular oil changes, air filter replacements, and spark plug inspections.