25 MPG combined isn’t the only thing to define the 2023 Lexus LS 500h, but it is the price for flagship-level luxury combined with a hybrid powertrain. This isn’t a performance-oriented hybrid. Its mission is quietness, a near-silent glide over virtually any road surface, and smooth transitions between gasoline and electric power. For the buyer prioritizing a plush ride and an impeccably crafted interior over outright fuel savings, this hybrid LS is a good choice.

City and highway performance

The LS 500h’s EPA ratings show a predictable difference between city and highway fuel economy. The city figure is 22 MPG, which reflects the hybrid system’s ability to prioritize electric power at lower speeds and during stop-and-go driving. The regenerative braking system also helps, recouping energy that would otherwise be lost as heat. On the highway, this system is less relevant, and the 3.5L V6 engine does more of the work. As a result, highway fuel economy climbs to 29 MPG, a respectable number for a large sedan pushing 4,800 pounds.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2023 Lexus LS 500h at $2,300. This figure is based on driving 15,000 miles per year, with 55% of that mileage being in the city and 45% on the highway. The estimate also assumes national average fuel prices. While your actual fuel costs might vary depending on your driving habits and local fuel prices, this provides a standardized baseline for comparison. Remember that premium fuel is recommended, further impacting the cost per gallon and pushing the overall annual expense higher than some competitors.

Real-world expectations

Drivers can expect to achieve fuel economy close to the EPA estimates in normal driving conditions. However, aggressive acceleration, frequent hard braking, and sustained high-speed cruising will negatively impact fuel economy. The onboard fuel economy monitor provides real-time MPG and trip averages, which can be a helpful tool for optimizing driving habits. Remember that the LS 500h prioritizes comfort and refinement, not sporty driving. Smooth acceleration and gentle braking are key to maximizing efficiency in this vehicle.

How it compares

Compared to other luxury hybrid sedans, the Lexus LS 500h occupies a middle ground in terms of fuel efficiency. The BMW 745e, for example, offers significantly better city MPG in electric mode but its combined MPG rating is similiar to the LS 500h when operating as a hybrid. Meanwhile, gas-only competitors like the Mercedes-Benz S500, with an EPA combined rating in the low 20s, clearly lag behind the LS 500h. Potential buyers consider the LS 500h for its specific blend of luxury, reliability, and fuel efficiency within the full-size segment. Find all Lexus fuel economy data to see how other models compare.

Tips to maximize efficiency

Use the “Eco” mode. The LS 500h’s Eco mode remaps the throttle response and adjusts the climate control system to prioritize fuel efficiency. While it might slightly reduce acceleration performance, the difference is often negligible in normal driving, and the fuel savings can be significant over time. Regularly monitoring the trip computer will display your average MPG and show where there is room for improvement.

Gentle acceleration and braking are critical when attempting to maximize the fuel economy of the LS 500h. Avoid sudden bursts of speed or harsh braking maneuvers as these quickly deplete the battery charge and force the gasoline engine to work harder. Anticipate traffic flow and maintain a smooth, steady speed whenever possible. Looking at LS MPG across all years will show consistent MPG figures.

Tire pressure can have a significant impact on fuel economy. Ensure that your tires are properly inflated to the recommended pressure listed on the driver’s side doorjamb. Underinflated tires increase rolling resistance and reduce fuel efficiency. Regularly check and adjust tire pressure, especially during seasonal changes in temperature.

Minimize idling time. Letting the engine idle for extended periods wastes fuel needlessly. If you’re stopped for more than a minute or two, turn off the engine. The LS 500h’s hybrid system allows for near-silent operation at low speeds, so this is a particularly effective strategy in city driving. Just be aware, quick restarts can sometimes consume more gas than short idles.

Reduce your car’s weight. Removing unnecessary items from the trunk and interior can significantly improve your MPG.