The 2019 Lexus GS 350 AWD gets 21 MPG combined. Nobody buys a GS 350 expecting Prius-like efficiency. It is a mid-size luxury sedan with a smooth, powerful V6 and all-wheel drive. Buyers prioritize a refined driving experience, comfortable interior, and Lexus reliability over absolute fuel savings, and that 21 MPG reflects those priorities.

City and highway performance

The EPA estimates the GS 350 AWD will achieve 19 MPG in the city and 26 MPG on the highway. The city figure is arguably the more relevant one for this car as it excels as a comfortable daily driver and commuter. While the highway number isn’t terrible, the V6 engine provides effortless acceleration, making merging and navigating city traffic a breeze.

Stop-and-go driving inherently impacts fuel economy, but the GS 350’s responsive powertrain makes it a smooth and enjoyable experience, even in heavy traffic. The highway number reflects that at moderate speeds, the Lexus settles into relaxed cruising that doesn’t negatively affect fuel economy too badly, but the target consumer is not buying this car to save gas on long family road trips.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Lexus GS 350 AWD at $2,750. This figure is based on driving 15,000 miles per year and using current national average fuel prices. Actual fuel costs will vary depending on driving habits, location, and fuel prices. Expect to exceed that $2,750 estimate if you primarily drive in congested city conditions and have a heavy foot. Fuel prices also vary from state to state, so expect to pay even more if you are in California or Hawaii.

Real-world expectations

While the EPA estimates provide a useful benchmark, real-world fuel economy often differs. GS 350 AWD owners report numbers that are close to the EPA estimates. However, aggressive driving or frequent short trips can lower the average. Tire pressure, vehicle maintenance, and even the grade of gasoline used also play a role. Consistent adherence to the vehicle’s maintenance schedule and responsible driving habits are critical for achieving the best possible fuel economy.

How it compares

The GS 350 AWD’s fuel economy falls in the middle of its competitors. The BMW 540i xDrive, for example, is rated at 23 MPG combined, offering slightly better efficiency with similar performance. The Mercedes-Benz E450 4MATIC manages 25 MPG combined and is the better option if fuel economy is your main goal. The Acura TLX SH-AWD with the V6 engine delivers 23 MPG combined. These differences might seem small, but they can add up over time.

Buyers choosing the Lexus value the Lexus brand’s reputation for reliability and the GS’s comfortable, composed driving dynamics. Fuel efficiency is not their only concern. Shoppers can also review all Lexus fuel economy data to compare similar models. Checking GS MPG across all years is another way buyers can assess fuel consumption data.

Tips to maximize efficiency

Drive smoothly and avoid aggressive acceleration. The GS 350’s V6 engine delivers ample power, so there’s no need to floor it at every opportunity. Gentle acceleration and anticipating traffic flow will improve fuel economy.

Maintain proper tire pressure. Underinflated tires increase rolling resistance, which negatively impacts fuel efficiency. Check your tire pressure regularly and inflate them to the recommended levels, which can typically be found on a sticker inside the driver’s side doorjamb or in the owner’s manual. This is a simple way to get optimal mileage out of your tank.

Reduce unnecessary weight. Carrying extra weight in your vehicle forces the engine to work harder. Remove any unnecessary items from your trunk or cabin to improve fuel economy, especially if you only use them infrequently.

Consider using “Eco” mode. The GS 350 features an “Eco” mode that adjusts throttle response and transmission shift points to prioritize fuel efficiency. While it may slightly reduce performance, it can help you save fuel, especially in city driving. The difference in performance may not even be noticeable to the average driver.

Minimize idling. Letting your engine idle for extended periods consumes fuel without moving. If you’re stopped for more than a minute, turn off the engine. Modern cars are designed to restart quickly and efficiently.