The 2021 Lexus LC 500 Convertible achieves 18 MPG combined. Buyers shopping for a drop-top grand tourer powered by a naturally aspirated 5.0L V8 are likely not prioritizing fuel efficiency. The appeal of this car lies in the visceral thrill of the engine, the open-air driving experience, and the statement it makes. For those who value these aspects, the LC 500 Convertible is a thirsty, but attractive car. These buyers are often driven by emotion, drawn to the car’s design and the powerful sound of its engine more than the numbers on a fuel economy label.

City and highway performance

The EPA estimates the LC 500 Convertible achieves 15 MPG in the city and 25 MPG on the highway. The city figure reflects the realities of stop-and-go traffic where the V8 is constantly working to overcome the car’s weight.

Out on the open road, the 10-speed automatic transmission allows the engine to cruise more efficiently, resulting in a better highway number. Aggressive driving, tempting with such a responsive engine, will reduce those highway savings. The 25 MPG highway rating is achievable only with a light foot and disciplined throttle control. You can research all Lexus fuel economy data for more information on the brand’s efficiency.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2021 Lexus LC 500 Convertible at $3,200. This is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway and assuming a set national average fuel price at the time of testing.

Fluctuations in gasoline prices will directly impact your actual annual fuel expenses. If you drive more aggressively, or significantly exceed the 15,000-mile annual average, expect that $3,200 figure to increase.

Real-world expectations

Your real-world MPG will vary from the EPA benchmark. Factors like driving style, road conditions, traffic, and tire pressure influence fuel consumption. Owners who frequently drive hard may see numbers closer to the city rating, even on mixed driving. Those who accelerate smoothly, anticipate traffic, and maintain consistent speeds can expect results closer to the combined EPA estimate. Many owners average slightly below the rated 18 MPG in daily driving.

How it compares

The LC 500 Convertible’s fuel economy is lower than some competitors, but that’s not unexpected. The BMW M850i Convertible achieves a combined 19 MPG with its twin-turbo V8. The Porsche 911 Carrera S Cabriolet manages a significantly better 20 MPG combined with its turbocharged flat-six. The Aston Martin Vantage Roadster claims 20 MPG combined using its AMG-sourced V8.

For someone cross-shopping these vehicles, the difference in fuel cost might be a secondary concern. However, it’s still a data point, and owners looking at LC MPG across all years should be aware of the tradeoffs between performance and efficiency.

Tips to maximize efficiency

Gentle acceleration helps minimize fuel consumption in the LC 500 Convertible. Avoid abrupt starts and stops, and try to anticipate traffic to maintain a more consistent speed. When you fully depress the accelerator, that V8 consumes fuel. Smooth inputs are more efficient.

Consider which drive modes you select. “Sport” mode enhances throttle response and shift points for more aggressive driving, and it also reduces fuel economy. Select “Comfort” or “Eco” mode when cruising or navigating city streets to prioritize less gas.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, forcing the engine to work harder and consuming more fuel. Check your tire pressure regularly and maintain the levels specified in your owner’s manual.

Proper maintenance helps fuel efficiency. Regular oil changes, air filter replacements, and spark plug maintenance ensure the engine runs optimally, maximizing combustion efficiency and reducing fuel consumption.