The 2022 Lexus IS 500 gets 20 MPG combined, which isn’t Prius-like, but expected for its design. It’s not built for maximum efficiency. Instead, it gives drivers the thrill of a naturally aspirated 5.0L V8. IS 500 buyers aren’t looking at hybrid sedans. They want a mix of Lexus refinement and old-school power and accept the fuel consumption.

City and highway performance

EPA estimates for the Lexus IS 500 are 17 MPG in the city and 25 MPG on the highway. The city figure shows the engine’s thirst in stop-and-go driving, where the V8’s size and lack of hybrid assistance are obvious. The highway number is better because the eight-speed automatic transmission settles into a relaxed cruising gear. However, even on the open road, a heavy foot reduces fuel savings, as it’s tempting to tap into the engine’s power.

Annual fuel cost

The EPA projects an annual fuel cost of $2,900 for the 2022 Lexus IS 500. This is based on driving 15,000 miles per year with mixed city and highway driving, using the EPA’s average national fuel prices estimate. Individual fuel costs will vary based on driving habits and local prices, but this is a useful benchmark for understanding the financial commitment of owning this car. Also, the IS 500 needs premium gasoline to perform best.

Real-world expectations

While the EPA estimates are a standard, real-world MPG for the IS 500 changes based on driving styles and conditions. Drivers who often accelerate quickly and drive in city traffic will likely see fuel economy closer to the low end of the EPA range, or even lower. Drivers with conservative styles who mainly drive on the highway might get numbers closer to, or even slightly exceeding, the 25 MPG highway rating. Expect to visit gas stations regularly.

How it compares

The IS 500’s fuel economy puts it with other performance sedans. The BMW M340i, not a direct V8 competitor, is a good mix of performance and efficiency, getting about 26 MPG combined with its turbocharged inline-six. A Mercedes-AMG C43 gets similar figures around 22 MPG combined. The previous generation Lexus IS F with its 5.0 V8 got about the same MPG as the current IS 500. The Acura TLX Type S, with its turbocharged V6, is also in this performance group, averaging about 21 MPG combined. IS 500 buyers are trading MPGs for the sound and feel of a naturally aspirated V8, a trade-off worth it for the driving experience. View all Lexus fuel economy data to put IS 500’s numbers in perspective.

Tips to maximize efficiency

While the IS 500 isn’t made for fuel efficiency, owners can minimize consumption. Avoid aggressive acceleration and hard braking, as these make the engine work harder and burn more fuel. Gentle throttle inputs maintain momentum and reduce fuel burn.

When possible, use the IS 500’s drive mode selector to choose “Eco” mode. It will slightly reduce throttle response and optimize engine and transmission settings for better fuel economy, particularly during steady cruising.

Make sure the tires are inflated to the recommended pressure. Underinflated tires increase rolling resistance, making the engine work harder and reducing fuel efficiency. Check tire pressures often and adjust them.

Regular maintenance, including oil changes and air filter replacements, is critical for keeping optimal engine performance and fuel economy. A clean air filter ensures proper airflow, while fresh oil reduces friction and improves efficiency. You can research the IS MPG across all years to compare with this one.

Minimize idling time, as it wastes fuel. If you’ll be stopped for more than a minute or two, turn off the engine to save fuel. Reducing idling time can improve overall fuel economy.