25 MPG combined is a reasonable figure for the 2023 Lexus LS 500h AWD, but it’s not the main reason people buy it. This flagship sedan is purchased by those who prioritize a quiet and comfortable driving experience above all else. Fuel efficiency is a secondary concern, addressed here by Lexus’s proven hybrid technology rather than outright downsizing or turbocharging.

City and highway performance

The EPA estimates for the 2023 Lexus LS 500h AWD reveal a split of 22 MPG in the city and 29 MPG on the highway. The city number is surprising because the hybrid system can lean heavily on electric power in stop-and-go traffic. Conversely, the 29 MPG highway figure reflects aerodynamic and rolling resistance at higher speeds. The electric motor assists but doesn’t dominate on the open road. These numbers are realistically achievable, provided you temper your expectations and your right foot.

Think smooth and deliberate, not aggressive launches and sudden braking.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2023 Lexus LS 500h AWD at $2,300. This figure is based on driving 15,000 miles per year, with fuel prices reflecting a national average. This is only an estimate. Your actual cost will depend on your driving habits, the prevailing gasoline prices in your region, and the type of fuel you use. This $2,300 is a useful benchmark, but it’s important to personalize it to your individual circumstances.

Real-world expectations

The official EPA numbers provide a framework, but real-world experience can vary. Drivers with a heavier foot or those who frequently drive in demanding conditions, such as mountainous terrain or heavy traffic, may see lower numbers. However, those who prioritize smooth acceleration, anticipate traffic flow, and maximize regenerative braking potential can realistically meet or even exceed the EPA’s estimates.

The mild-hybrid powertrain in the LS 500h is very good with stop and go traffic. It will turn off the engine often. Even with a light foot, don’t expect to see MPG numbers resembling those of a dedicated hybrid hatchback. This is a large, luxurious sedan with all-wheel drive and considerable weight.

How it compares

Competitors reveal a spectrum of fuel efficiency. The Mercedes-Benz S500 4MATIC, with its turbocharged inline-six, achieves a combined 24 MPG. The BMW 740i, also with a turbocharged inline-six, nets a similar 25 MPG combined. The Audi A8, another technologically advanced sedan, lands in the same ballpark. These cars offer similar luxury to the LS 500h but achieve their MPG figures through different engineering approaches.

For shoppers who are considering Lexus, be sure to review all Lexus fuel economy data. It’s also worth comparing the LS MPG across all years.

Tips to maximize efficiency

Take advantage of the LS 500h’s drive modes. Eco mode prioritizes fuel efficiency by adjusting throttle response and climate control settings. It’s designed for casual cruising and can significantly reduce fuel consumption, especially in stop-and-go traffic. Sport mode does the opposite, sharpening responses and reducing fuel economy as a result.

Anticipate traffic and coast whenever possible. Letting off the accelerator early allows the hybrid system to maximize regenerative braking, converting kinetic energy back into electricity and reducing the need for the friction brakes. Gradual deceleration is far more efficient than last-minute hard braking.

Monitor the energy flow display. The LS 500h’s instrument panel provides a real-time visual representation of how the hybrid system is operating. Pay attention to when the electric motor is being used and try to maximize its usage by accelerating smoothly and avoiding excessive throttle input.

Regular maintenance is critical. Ensuring that the tires are properly inflated, the engine oil is clean, and the air filter is not clogged will contribute to optimal fuel efficiency. Follow the manufacturer’s recommended maintenance schedule to keep the LS 500h running at its best.

Minimize unnecessary weight. Carrying excessive cargo adds strain to the engine and reduces fuel efficiency. Remove any unnecessary items from the trunk and cabin to lighten the load and improve MPG. Even small reductions in weight can have a noticeable impact over time.