25 MPG combined is a sobering figure for the 2024 Lexus LS 500h AWD. This isn’t a fuel-sipping hybrid aiming for hypermiling records; it’s a meticulously crafted luxury sedan that prioritizes a smooth, quiet, and effortlessly powerful driving experience. Its buyers are typically less concerned with absolute fuel cost and more focused on the quiet competence this flagship offers. They desire a sanctuary on wheels, and they understand that a certain level of fuel consumption is the price to pay for that level of opulent refinement.

City and highway performance

The EPA estimates 22 MPG in the city and 29 MPG on the highway for the all-wheel-drive LS 500h. This split reflects its hybrid powertrain. In urban environments, the electric motor helps more, allowing for periods of near-silent, emissions-free cruising and supplementing the V6 during acceleration. The highway figure, while respectable for a car of this size and weight, shows the limitations of relying solely on the 3.5L V6 engine at higher speeds. The complex automatic transmission (AV-S10) is tuned for smooth shifts, prioritizing comfort over outright efficiency.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2024 Lexus LS 500h AWD is $2,300. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, and using the national average fuel price, which fluctuates constantly. It’s a useful benchmark, but individual expenses depend heavily on personal driving habits and regional fuel costs. The calculation uses the car’s MPG ratings and assumes a standardized driving pattern, but your actual spending could be higher or lower.

Real-world expectations

While the EPA estimates are a good starting point, real-world fuel economy often differs. Drivers who frequently accelerate quickly or spend a lot of time in stop-and-go traffic are likely to see figures closer to the city rating. Those undertaking long highway journeys at consistent speeds may approach or even exceed the 29 MPG estimate. Factors such as ambient temperature, tire pressure, and the use of accessories like air conditioning also play a role. Reviewing LS MPG across all years can give you an idea of trends.

How it compares

The LS 500h’s fuel economy stacks up against its rivals in interesting ways. The BMW 740i, with its inline-six engine, achieves around 28 MPG combined, showing a slight edge. The Mercedes-Benz S500, another key competitor, delivers an estimated 24 MPG combined, very close to the Lexus. The Audi A8 offers similar numbers, depending on the specific engine configuration. The LS 500h is not dramatically more or less efficient than its peers. However, the Acura RLX Sport Hybrid, now discontinued but worth considering on the used market, achieved a noteworthy 29 MPG combined, proving that a hybrid powertrain in this segment can prioritize efficiency. Buyers cross-shopping these vehicles may value other factors more, such as Lexus’s renowned reliability and customer service, or the specific technologies in its competitors.

Tips to maximize efficiency

Gentle acceleration and anticipation of traffic flow are critical. The LS 500h responds well to a light foot on the accelerator, allowing the electric motor to do more of the work, especially at lower speeds. Avoid aggressive starts and abrupt braking, as these actions consume more fuel and reduce the benefits of the hybrid system.

Maintaining proper tire pressure is essential for safety and for optimizing fuel economy. Underinflated tires create more rolling resistance, forcing the engine to work harder. Check your tire pressure regularly and inflate to the recommended levels, which can be found on a sticker inside the driver’s side door.

Minimize unnecessary weight in the vehicle. The heavier the load, the more fuel the engine consumes. Remove any items from the trunk or cabin that are not essential for your journey. Even small weight reductions can help over time.

Use the car’s drive mode selector carefully. The “Eco” mode optimizes various vehicle settings for maximum fuel efficiency, but it may slightly reduce throttle response and performance. Experiment with different modes to find the balance that suits your driving style and prevailing conditions, remembering that “Sport” mode prioritizes performance over fuel economy.

Planning your routes can also improve fuel efficiency. Avoid congested areas and routes with frequent stops and starts whenever possible. Using navigation apps to identify and go around traffic bottlenecks can help maintain a more consistent speed and reduce fuel consumption. You can view all Lexus fuel economy data on our site.