The 23 MPG combined fuel economy of the 2018 Mercedes-Benz AMG SLC43 isn’t going to win any awards, nor is it designed to. This is a performance-focused roadster, built to deliver thrills first and foremost. Its buyers aren’t prioritizing fuel efficiency above all else, but the exciting mix of a potent engine and a sleek, open-air driving experience from all Mercedes Benz fuel economy data.

City and highway performance

The AMG SLC43 achieves an EPA-estimated 20 MPG in the city and 29 MPG on the highway. The city figure reflects stop-and-go traffic, where the engine is constantly accelerating and decelerating, which impacts fuel consumption. The highway number showcases the efficiency potential when the car cruises at a steady speed. The 9-speed automatic transmission plays an important role in achieving this highway figure, allowing the engine to operate at lower RPMs and conserve fuel.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 AMG SLC43 at $2,500. This is based on driving 15,000 miles per year and using national average fuel prices. This is just an estimate; actual fuel costs will vary depending on individual driving habits, local fuel prices, and the fuel type used. The $2,500 figure is a useful benchmark, but it is not a guarantee of what you will personally spend on fuel.

Real-world expectations

While the EPA estimates provide a useful starting point, real-world fuel economy can vary considerably. Aggressive driving, frequent short trips, and even tire pressure can impact the numbers you actually see. Owners who prioritize performance and enjoy the car’s sporty capabilities can expect fuel economy closer to the city estimate, especially if they live in urban environments with a lot of traffic.

Those who primarily use the car for longer highway drives, and adopt a more fuel-conscious driving style, may be able to achieve or even slightly exceed the EPA’s highway estimate. If you regularly activate the AMG’s performance settings, prepare for lower-than-advertised MPG figures from this piece of the AMG MPG across all years story.

How it compares

Compared to other performance roadsters, the 2018 AMG SLC43’s fuel economy is reasonable. The Porsche 718 Boxster S, with its 2.5-liter turbo four-cylinder, achieves an EPA-estimated 22 MPG combined. The BMW Z4 M40i, a more direct competitor with a similar focus on performance and luxury, manages around 25 MPG combined with its inline-six. Certain V8 variants of the Chevrolet Corvette trade fuel economy for earth-shattering power. Buyers in this segment are often willing to accept a small penalty in fuel efficiency for the specific character and performance offered by each model.

Tips to maximize efficiency

Use the “Comfort” driving mode when you are not actively seeking a sporty driving experience. This mode adjusts the engine and transmission settings to prioritize fuel efficiency over maximum performance. The difference can be noticeable, especially during city driving.

Monitor your tire pressure regularly. Properly inflated tires reduce rolling resistance, which can improve fuel economy. Check the sticker on the driver’s side doorjamb for the recommended tire pressure for your AMG SLC43.

Avoid unnecessary idling. If you anticipate being stopped for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, and idling wastes fuel.

Plan your routes to avoid stop-and-go traffic whenever possible. Constant acceleration and braking significantly decrease fuel economy. Using navigation apps to find less congested routes can make a difference.

Use cruise control on the highway. Maintaining a consistent speed helps optimize fuel efficiency. However, be mindful of changing traffic conditions and adjust your speed accordingly.