The 2019 Mercedes-Benz AMG SL63 gets 18 MPG combined. Drivers who appreciate this car likely won’t be concerned about its fuel economy. The SL63 exists to deliver a visceral, high-performance driving experience, swathed in luxury, and powered by a hand-built AMG engine. Owners prioritize prodigious power and a distinctive exhaust note far more than saving on fuel. This is a grand tourer designed for thrilling weekend drives and effortless cross-country journeys, not hypermiling competitions.

City and highway performance

The EPA estimates the SL63’s fuel economy at 15 MPG in the city and 23 MPG on the highway. The city figure might be optimistic unless you drive very gently. The significant torque from the 5.5L V8 encourages strong acceleration. Highway fuel efficiency may be easier to achieve, especially if you avoid exploiting the engine’s power on open roads. While generally responsive, the 7-speed automatic transmission doesn’t prioritize fuel savings. It’s programmed to deliver quick shifts and keep the engine in its powerband, which creates an engaging driving experience but reduces fuel efficiency.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2019 Mercedes-Benz AMG SL63 at $3,200. This is based on driving 15,000 miles per year and using national average fuel prices. Note that premium fuel is required, which increases running costs. While the EPA estimate provides a general idea, your actual fuel expenses will depend on your driving habits, the type of fuel you purchase, and the number of miles you drive each year.

Real-world expectations

Consistently matching the EPA’s fuel economy numbers can be difficult. Real-world conditions, driving style, and traffic all play a significant role. Owners who frequently drive aggressively will likely see numbers below the official estimates. However, drivers who primarily use the SL63 for relaxed highway cruising, and who are careful with the accelerator, might achieve results closer to the EPA’s highway rating. Regardless, those buying this vehicle understand that fuel efficiency is the sacrifice for such high performance.

How it compares

The SL63’s fuel economy is predictably low compared to other high-performance roadsters. A Porsche 911 Carrera S Cabriolet, while still performance-oriented, gets around 21 MPG combined. A BMW M850i Convertible achieves a similar figure. Even the Jaguar F-Type R Convertible, despite its supercharged V8, can sometimes achieve slightly better mileage. The SL63 prioritizes raw power and a distinct AMG character over fuel efficiency. Some competitors offer slightly better numbers, but they don’t deliver the same combination of luxury, exclusivity, and power that defines the SL63. For those seeking better fuel costs within the Mercedes-Benz lineup, examining all Mercedes Benz fuel economy data reveals numerous more sensible options. Exploring AMG MPG across all years highlights the performance focus of this sub-brand regardless of model year.

Tips to maximize efficiency

Be gentle with the throttle, especially during city driving. The AMG’s engine responds instantly to minor changes in gas pedal position, so fuel consumed can quickly increase with aggressive driving.

Cruise control on long highway drives can help. Maintaining a constant speed minimizes unnecessary acceleration and deceleration, which helps improve fuel efficiency. Also be sure to use the highest gear possible.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which negatively affects fuel economy. Check your tire pressure regularly and inflate them to the recommended level.

Reduce unnecessary weight in the vehicle. Extra cargo adds to the overall load, forcing the engine to work harder and consume more fuel. Remove any items you don’t need from the trunk and passenger compartment.

Consider a less aggressive driving mode, if equipped. Some AMG models offer selectable driving modes that prioritize fuel efficiency over performance. These modes can help moderate throttle response and shift patterns, leading to improved mileage.