31 MPG combined is respectable for the 2017 Lexus GS 450h. More importantly, it shows what this hybrid sedan offers: luxury, performance, and lower fuel costs can exist together. The GS 450h appeals to buyers who appreciate a well-crafted interior, subtle executive styling, and the easy power of its hybrid powertrain, but also want to minimize their carbon footprint and fuel costs. They understand the trade-offs in any car purchase, and they find the mix of efficiency, performance, and luxury in the GS 450h aligns with their values.

City and highway performance

The EPA numbers for the 2017 Lexus GS 450h are 29 MPG in the city and 34 MPG on the highway. The higher highway number shows the Atkinson-cycle engine and the hybrid system optimize gas use at a steady speed. In cities, the electric motor often handles low-speed driving, reducing gasoline use and helping the city MPG number. The 3.5L V6 engine with electric motor provides smooth and responsive acceleration in all driving, whether in stop-and-go traffic or merging onto the freeway. This is a refined system that uses electric power to enhance the driving experience.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Lexus GS 450h is $1,850. This is based on driving 15,000 miles per year and using national average fuel prices. It provides a way to compare the running costs of different vehicles. Individual fuel costs will vary depending on driving and location, but the EPA estimate offers a standard measure for evaluating the long-term financial effects of owning the GS 450h. Keep in mind that premium gasoline is recommended, which adds to the total cost, but the good fuel economy helps offset this. Considering the performance and luxury, this is a reasonable cost.

Real-world expectations

EPA estimates are a guide, but your actual fuel economy will vary based on your driving, traffic, and maintenance. Expect figures close to the EPA ratings if you drive conservatively and on relatively flat roads. Aggressive acceleration, hard braking, and idling will hurt your fuel economy. Cold weather can also reduce fuel efficiency, as the engine may need to run more to maintain temperatures. Regular maintenance, including proper tire inflation and oil changes, is important for getting the best possible fuel economy from your GS 450h. Owners who prioritize fuel efficiency and drive carefully will likely find that they can meet or exceed the EPA estimates.

How it compares

The 2017 Lexus GS 450h is known in the luxury sedan area for its efficiency. The BMW 530e, a plug-in hybrid, has a smaller engine and can deliver higher MPGe figures when using its electric range, but its combined EPA rating is around 29 MPG and requires frequent charging. The Mercedes-Benz E350 typically achieves around 24 MPG combined. Even the Acura RLX Sport Hybrid achieves an EPA combined rating of around 29 MPG. These numbers show the GS 450h provides a good mix of performance and fuel economy. For the buyer considering all Lexus fuel economy data, the GS 450h is a good choice and the GS MPG across all years shows it.

Tips to maximize efficiency

Use the GS 450h’s Eco mode. This setting adjusts throttle response and climate control to prioritize fuel efficiency. While it may slightly reduce performance, it can help save gas, especially during city driving. Engage “EV” mode on occasion at slow speeds.

Watch traffic flow and avoid unnecessary acceleration and braking. Maintaining a consistent speed and slowing down when approaching intersections can improve fuel economy. The GS 450h’s regenerative braking system captures energy during deceleration, but gentle braking is more efficient than abrupt stops.

Make sure your tires are properly inflated to the recommended pressure. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly, especially during temperature changes, as pressure can change.

Reduce the weight you carry in your vehicle. Excess weight increases the energy required to accelerate and maintain speed, which hurts fuel economy. Remove unnecessary items from your trunk and interior.