The 2018 Lexus GS 300 F Sport, equipped with a 2.0L turbocharged four-cylinder engine, gets 24 MPG combined. While this isn’t class-leading fuel economy, it reflects a trade-off made by buyers who want sharp styling, a well-appointed interior, and the engaging driving experience associated with the F Sport badge. These drivers, often younger professionals, prioritize a stylish and comfortable sedan that makes a statement without excessive fuel costs, even if it means slightly more frequent fill-ups.

City and highway performance

The GS 300 F Sport achieves an EPA-estimated 21 MPG in the city and 30 MPG on the highway. The 21 MPG city rating reflects typical urban driving conditions, where the engine’s start-stop system and the eight-speed automatic transmission’s lower gears are frequently operating. The highway number of 30 MPG shows the engine’s ability to cruise efficiently at steady speeds. Consistency is key. Aggressive acceleration and frequent overtaking will quickly reduce that 30 MPG figure.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Lexus GS 300 F Sport at $2,400 per year. This is based on driving 15,000 miles annually with a mix of city and highway driving, using the national average fuel price at the time of calculation. Your actual fuel costs will vary depending on your driving habits, the type of fuel you use, and changes in fuel prices.

Real-world expectations

While the EPA estimates offer a benchmark, the GS 300 F Sport’s real-world MPG often differs. Owners commonly report figures close to the EPA estimates under normal driving conditions. However, aggressive driving or mostly city commutes can easily drop the combined MPG into the high teens or low twenties. Conversely, careful highway driving can sometimes yield MPG figures exceeding the 30 MPG EPA estimate. Monitoring your trip computer and adjusting your driving style can help you match the advertised figures. Compare GS MPG across all years to see how this model compares.

How it compares

The 2018 Lexus GS 300 F Sport is in a competitive segment, where fuel economy is a key consideration. The BMW 530i, with its 2.0L turbocharged engine, achieves a slightly better EPA combined rating of 27 MPG. The Mercedes-Benz E300 also gets 24 MPG combined, with slightly higher highway mileage. The Acura TLX with the 2.4-liter inline-4 manages 27 MPG combined. These slight differences may not deter GS 300 F Sport buyers, who may value Lexus’ reputation for reliability and the unique styling of the F Sport package over maximum fuel efficiency. For those focused on getting the most out of every gallon, checking all Lexus fuel economy data may be helpful.

Tips to maximize efficiency

Use the GS 300 F Sport’s drive mode selector. Selecting “Eco” mode will adjust the throttle response and transmission shift points to prioritize fuel efficiency over performance. This is especially helpful in city driving and can make a difference over time in stop-and-go traffic.

Keep your tires properly inflated to the pressure listed on the driver’s side doorjamb. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel. A simple tire pressure check can significantly improve your MPG.

Avoid aggressive acceleration and hard braking. The turbocharged engine provides substantial power, making fast acceleration tempting, but it reduces fuel efficiency. Smooth, gradual acceleration and anticipating traffic flow will help you maintain a more consistent speed and use less gas, while also preserving brake pad life.

Minimize idling. If you expect to be stopped for more than a minute, turn off the engine. The GS 300 F Sport has an automatic start-stop system, so trust and this system to do its job. Prolonged idling consumes fuel without traveling, significantly reducing your MPG, especially in suburban areas with frequent stop lights.