28 MPG combined is a respectable figure for the 2018 Lexus LS 500h, a flagship sedan designed for quiet comfort and effortless power rather than outright fuel efficiency. The LS 500h isn’t chasing Prius-level economy; it’s offering a guilt-free experience for those seeking a luxurious and technologically advanced automobile. Drivers who want the largest Lexus sedan, but still desire decent fuel economy in order to avoid filling up at the pump as often, will accept 28 MPG as a reasonable tradeoff for the vehicle’s many strengths.

City and highway performance

The LS 500h’s fuel economy breaks down to 25 MPG in the city and 33 MPG on the highway. The city MPG is respectable for a large car moving around at lower speeds. The highway figure is where the hybrid system truly shines, using regenerative braking and electric assist to reduce gasoline consumption at sustained cruising speeds. Remember that stop-and-go traffic will be the hybrid’s forte, unlike the standard LS 500 which relies exclusively on gasoline for power and will see its MPG suffer greatly in similar conditions.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Lexus LS 500h at $2,050. This calculation is based on driving 15,000 miles per year and using national average fuel prices. This figure provides a useful baseline for comparing the running costs of different vehicles. However, your actual fuel costs may vary depending on your driving habits, local fuel prices, and the type of fuel you use. You can view LS MPG across all years to see how the 500h compares among different models and powertrains.

Real-world expectations

The EPA figures are obtained under controlled conditions. Real-world fuel economy will vary depending on several factors, including driving style, road conditions, and weather. An aggressive driver who frequently accelerates hard and brakes late will likely see lower MPG than someone who drives more conservatively. Hilly terrain or stop-and-go traffic can negatively impact fuel economy. Cold weather can also reduce MPG, as the engine needs to work harder to reach optimal operating temperature, and the battery performs less efficiently. Most LS 500h drivers report figures close to the EPA estimates, reflecting the car’s relatively efficient hybrid system.

How it compares

The LS 500h’s fuel economy fares well against its competitors in the luxury sedan segment. The non-hybrid LS 500, for example, gets just 22 MPG combined. Comparing the numbers against other brands, the Mercedes-Benz S 560 manages 21 MPG combined. Certain models in the BMW 7 Series range achieve slightly higher numbers, with the 740e xDrive plug-in hybrid rated at 27 MPG combined running on gasoline alone. The Audi A8, depending on the engine, will also fall close to the 22 MPG combined range. For the LS 500h buyer, the Lexus offers flagship-level luxury with a noticeable fuel economy advantage over many of its purely gasoline-powered rivals. If you want to explore all Lexus fuel economy data, there are a variety of tools online.

Tips to maximize efficiency

Use the LS 500h’s Eco drive mode in city driving. This mode softens throttle response and optimizes the hybrid system for maximum fuel efficiency. It’s perfectly adequate for the cut-and-thrust of urban environments and will noticeably reduce fuel consumption. It does not compromise safety, but rather asks you to be progressive with the throttle, and use the brakes gently.

Take advantage of regenerative braking. Anticipate stops and coast whenever possible, allowing the electric motor/generator to capture kinetic energy and recharge the battery. Avoid hard braking, as this relies more on the conventional friction brakes and wastes energy.

Keep your tires properly inflated. Underinflated tires increase rolling resistance, which can significantly reduce fuel economy. Check your tire pressures regularly and inflate them to the recommended levels found on the sticker inside the driver’s side door jamb.

Minimize idling. Extended idling consumes fuel without moving the car. If you’re stopped for more than a minute or two, turn off the engine. The LS 500h’s hybrid system allows transitions between electric and gasoline power, so you won’t experience any noticeable delay when restarting.

Reduce the load on the engine and your battery. Avoid using accessories like air conditioning or headlights more than necessary, as they can increase fuel consumption. The LS 500h is a technological marvel with a complex hybrid system, and if you are aware of how best to treat this system, your gas mileage will greatly improve.