19 MPG combined. That’s what you get with the 2018 Lexus GS F. It’s not a particularly impressive number when compared to modern hybrid and turbocharged performance sedans. The GS F isn’t about maximizing efficiency; it’s about delivering a visceral, naturally aspirated driving experience that has become increasingly rare. This is a car for someone who values the immediate throttle response and unique sound of a high-revving V8 above all else. People who prioritize fuel efficiency are looking at other cars, and Lexus engineers know it.

City and highway performance

The GS F’s EPA ratings break down to 16 MPG in the city and 24 MPG on the highway. The relatively low city MPG reflects the engine’s displacement and the fact that the car is just always ready to go. There’s no small-displacement, turbocharged compromise here; you get a full-fat 5.0-liter V8, so you’ll feel it at the pump during stop-and-go driving. The highway number, while not spectacular, is at least respectable. This is a product of the car’s aerodynamic shape and the eight-speed automatic transmission’s ability to cruise in a taller gear. Aggressive driving will diminish both figures, and a heavy foot is almost unavoidable if you want to experience the engine’s full potential.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2018 Lexus GS F at $3,050. This figure is calculated based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway, using national average fuel prices. Keep in mind that this is just an estimate; your actual fuel costs will depend on your individual driving habits, the type of roads you typically drive on, and local fuel prices, which can fluctuate significantly.

Real-world expectations

While the EPA ratings provide a useful baseline, real-world fuel economy for the GS F may vary considerably. Drivers who frequently engage in spirited driving, or who spend a lot of time in heavy traffic, are likely to see numbers below the EPA estimates. Conversely, those who primarily use the car for highway cruising, and who adopt a more conservative driving style, may be able to achieve slightly better fuel economy. Expect to observe fuel economy in this vehicle’s segment range from 15-25 MPG overall.

How it compares

Compared to its competitors, the GS F’s fuel economy falls on the lower end of the spectrum. The BMW M5 (F10 generation) with its turbocharged 4.4-liter V8, for example, achieves an EPA-rated 17 MPG city and 26 MPG highway. The Mercedes-AMG E63 S with its more modern twin-turbo V8 boasts 16 MPG city and 23 MPG highway. While the MPG numbers may seem close, the GS F requires premium fuel, and even a slight difference will be felt at the pump. For many GS F buyers, these fractional MPG gains are not worth the trade-off in engine character and driving experience. They choose the GS F 5.0L 8-cyl for the unique sound and feel of its naturally aspirated engine. Those seeking better numbers can review all Lexus fuel economy data and GS MPG across all years.

Tips to maximize efficiency

Even with a performance-oriented vehicle like the GS F, there are steps you can take to improve fuel economy. Avoid excessive idling. Modern engines are designed to be efficient when running, and prolonged idling consumes fuel without covering any distance. If you’re going to be stopped for more than a minute, it’s generally better to turn off the engine.

Drive smoothly and avoid aggressive acceleration and braking. The GS F’s powerful engine can easily tempt you to use its full potential, but resist the urge unless you’re on a track. Gradual acceleration and gentle braking will help minimize fuel consumption and extend the life of your brake pads.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressure regularly and inflate them to the recommended pressure listed on the doorjamb or in the owner’s manual.

Use cruise control on the highway. Maintaining a consistent speed helps improve fuel economy, especially on long trips. Cruise control minimizes unnecessary acceleration and deceleration, resulting in smoother and more efficient driving.