28 MPG combined is a respectable figure for the 2019 Lexus LS 500h, but it’s important to understand its limitations. It won’t win any green car awards, and it won’t impress buyers primarily concerned with maximizing fuel efficiency. This fuel economy rating is for luxury buyers who want a quiet, comfortable, and technologically advanced flagship sedan, and who are willing to accept above-average fuel efficiency as a welcome bonus, not the main reason for buying.

City and highway performance

The EPA numbers break down to 25 MPG in the city and 33 MPG on the highway. The city figure shows the benefits of the LS 500h’s hybrid powertrain in stop-and-go traffic, where the electric motor helps propel the car and reduces gasoline consumption. The highway figure is also competitive, aided by the LS 500h’s aerodynamic design and engine management. Highway MPG figures are particularly relevant for the longer commutes and weekend trips that Lexus LS owners often take.

Annual fuel cost

Based on the EPA’s estimates, expect to pay approximately $2,050 per year in fuel costs. This is calculated assuming 15,000 miles of driving per year, using the national average fuel price at the time of the EPA’s testing. Actual fuel costs will vary depending on driving habits, the type of driving, and local fuel prices. Primarily city drivers may see a slightly lower annual fuel cost, while predominantly highway drivers might experience results closer to the $2,050 estimate. This expense is a factor for LS 500h buyers, but is generally within an acceptable range given the overall cost and luxury positioning of the vehicle.

Real-world expectations

The EPA numbers provide a standardized benchmark, so consider real-world driving conditions. Aggressive driving, frequent acceleration, and heavy traffic can all negatively impact fuel economy. Careful driving habits, like maintaining a steady speed and anticipating traffic flow, can help achieve or even exceed the EPA estimates. The LS 500h’s hybrid system is particularly effective in maximizing fuel efficiency during moderate city driving. Factors like ambient temperature, tire pressure, and even the use of accessories like air conditioning can also affect fuel economy.

How it compares

The Lexus LS 500h is unique within the luxury sedan segment. The non-hybrid LS 500 achieves only 21 MPG combined. Compared to other large luxury sedans, the BMW 740i achieves 25 MPG combined, and the Mercedes-Benz S450 gets 24 MPG combined. The fact that the Lexus LS 500h is better than these conventionally powered models is a plus. If we examine all Lexus fuel economy data, we can see fuel efficiency is a key goal for many of their vehicles, but is not necessarily the ONLY goal. The LS 500h’s priority is smooth power delivery and comfort.

Tips to maximize efficiency

Use the available driving modes. The LS 500h offers Eco, Normal, and Sport modes. Eco mode prioritizes fuel efficiency by adjusting throttle response and optimizing the hybrid system’s operation. While it might not be ideal for spirited driving, it can improve fuel economy during routine commutes.

Pay attention to tire pressure. Properly inflated tires reduce rolling resistance, which improves fuel economy. Check tire pressure regularly and inflate them to the recommended level, which can be found on a sticker inside the driver’s side doorjamb or in the owner’s manual. This is simple and can yield immediately measurable results.

Avoid aggressive driving habits. Rapid acceleration and hard braking consume more fuel. Maintain a smooth and consistent speed, and anticipate traffic flow to avoid unnecessary acceleration and deceleration. The eCVT transmission in the LS 500h is programmed to conserve fuel. Learn to trust the system.

Minimize accessory use. Air conditioning, can put a strain on the engine and reduce fuel economy. Use the air conditioning sparingly and consider using the fan or opening the windows when appropriate. The available seat ventilation system can help keep you cool without the energy draw of the A/C. Owners wanting to compare LS MPG across all years should also remember that Lexus has been increasing luxury features for decades, slightly decreasing MPG year over year.