23 MPG combined is a reality check for anyone considering the 2017 Lexus GS 350. It’s not terrible, but it’s certainly not a selling point. This isn’t a vehicle bought by penny-pinchers looking for maximum thrift. The GS 350 buyer prioritizes a refined driving experience, a comfortable and well-appointed interior, and the reliable character Lexus is known for. Fuel economy is a factor, but it’s often further down the list next to those other attributes.

City and highway performance

The EPA estimates 20 MPG in the city and 28 MPG on the highway for the 2017 GS 350. That 20 MPG figure in urban environments reflects the engine’s need to work harder in stop-and-go traffic. The GS 350’s V6, though smooth and responsive, isn’t designed for hypermiling.

On the open road, the highway figure of 28 MPG becomes more attainable. The eight-speed automatic transmission allows the engine to cruise at lower RPMs, improving fuel efficiency during long trips. Keep in mind that aggressive driving or frequent acceleration will quickly diminish these numbers.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2017 Lexus GS 350 at $2,500. This figure is based on driving 15,000 miles per year and using national average fuel prices. Individual fuel costs will vary based on driving style, location, and current gasoline prices. While $2,500 may seem high compared to more fuel-efficient vehicles, it’s a cost many GS 350 owners are willing to bear for the luxury and performance the car provides.

Real-world expectations

While the EPA estimates provide a useful baseline, your actual fuel economy will likely vary. Aggressive acceleration, frequent short trips, and even tire pressure can impact fuel consumption. Owners reporting their experiences on fuel tracking apps and forums often see figures slightly below the EPA’s estimates, placing combined averages in the 20-22 MPG range for mixed driving. Those who spend more time on the highway or prioritize fuel efficiency through conservative driving habits might get closer to, or even exceed, the EPA’s 28 MPG highway number. Understanding that the 23 MPG combined rating is more of a best-case scenario is important for managing expectations when considering purchasing the 2017 Lexus GS 350, especially since lower fuel economy numbers could have broader implications as the years go on.

How it compares

The 2017 Lexus GS 350’s fuel economy lands in the middle of its competitive set. The BMW 540i from the same year, with its turbocharged inline-6 engine, often achieves a slightly better combined MPG of around 24-25 MPG. The Mercedes-Benz E300, though offering less power than the GS 350, pulls ahead with around 25-26 MPG combined due to its smaller turbocharged four-cylinder engine. Even some versions of the Cadillac CTS manages slightly better. The Acura TLX V6 SH-AWD is right there with the GS 350. Someone cross-shopping these vehicles needs to weigh fuel economy against other factors like driving dynamics, features, and brand reputation. Those seeking better fuel economy might consider these alternatives. Drivers looking to do more research can view all Lexus fuel economy data to compare against other Lexus SUV and car models alongside the GS MPG across all years.

Tips to maximize efficiency

Use the GS 350’s “Eco” driving mode when possible, especially during city driving. While it might slightly reduce throttle response, it helps the engine optimize fuel consumption by softening acceleration and tweaking transmission shift points. This small change can make a noticeable difference over time, especially in stop-and-go environments where gradual acceleration is more appropriate.

Maintain proper tire pressure. Underinflated tiers increase rolling resistance, forcing the engine to work harder and burn more fuel. Check your tire pressure regularly and inflate them to the manufacturer’s recommended specifications, typically found on a sticker located on the driver’s side doorjamb. Even a small increase in tire pressure can contribute to improved fuel efficiency.

Avoid aggressive driving habits. Rapid acceleration, hard braking, and high speeds significantly contribute to fuel inefficiency. Smooth and consistent driving is the key to maximizing fuel economy. Anticipating traffic flow and allowing for gradual acceleration and deceleration can reduce unnecessary fuel consumption.

Consider the weight you’re carrying around. Remove any unnecessary items from the trunk. Extra weight places a greater demand on the engine, leading to lower fuel economy. Regular decluttering can result in some improvements, no matter how minor. Your passenger load can also have a bearing.

Ensure your vehicle is properly maintained. Regular oil changes, air filter replacements, and other scheduled maintenance items contribute to optimal engine performance and fuel efficiency. A poorly maintained engine will inevitably consume more fuel. Following the manufacturer’s recommended maintenance schedule is most important.