19 MPG combined. It’s a number that might make a Prius owner wince, but it’s the reality for drivers who prioritize a visceral driving experience over outright fuel efficiency. The 2020 Lexus GS F, with its naturally aspirated 5.0L V8, is not a car for hypermilers. It’s for enthusiasts who crave the instant throttle response, the glorious noise, and the overall engagement that only a high-revving, naturally aspirated engine can deliver. This car connects the driver to the road, and fuel economy takes a backseat to that mission.

City and highway performance

The GS F’s fuel economy figures underscore its character. The city MPG is rated at 16, reflecting the engine’s thirst when navigating stop-and-go traffic. Expect frequent trips to the gas station if your commute is primarily urban. On the open road, the GS F fares better, achieving 24 MPG on the highway. This figure is respectable for a performance sedan with a large-displacement V8, and it makes longer road trips palatable. The eight-speed automatic transmission contributes to highway efficiency with its taller gear ratios, allowing the engine to cruise at lower RPMs.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2020 Lexus GS F is $3,050. This figure is based on driving 15,000 miles per year and using national average fuel prices. It’s important to remember that your actual fuel costs may vary depending on your driving habits, the type of fuel you use, and local fuel prices. Aggressive driving will significantly increase your fuel consumption, while a more relaxed driving style can help you achieve slightly better mileage. The EPA performs standardized tests to calculate MPG and estimates annual fuel costs; understanding the real-world driving experience can vary from the EPA’s testing methods, and this provides a better picture of what kind of fuel costs to expect.

Real-world expectations

While the EPA figures provide a baseline, real-world fuel economy often deviates. GS F owners who frequently indulge in spirited driving can expect fuel economy closer to the city rating, even on mixed routes. Conversely, those who prioritize smooth acceleration and consistent speeds on the highway may see figures slightly above the EPA estimate. Factors like tire pressure, vehicle load, and weather conditions can also influence fuel consumption. Ultimately, the 2020 Lexus GS F’s fuel economy is heavily dependent on the driver’s individual habits and driving environment. Find GS MPG across all years to see if your real-world experience aligns with other models.

How it compares

The GS F exists in a segment of performance sedans where fuel economy is seldom a top priority, but comparisons are still relevant. The BMW M5, for example, offers considerably more power and performance, but returns a combined 17 MPG (prior to its move to become PHEV). The Mercedes-AMG E63 S achieves a combined 19 MPG with its twin-turbo V8. The Cadillac CT5-V Blackwing comes in at 15 MPG combined with its supercharged V8. Those considering the GS F likely understand and accept its fuel consumption as part of the price for the unique qualities it offers: namely, a naturally-aspirated engine and Lexus reliability. These buyers weigh the GS F’s attributes differently than someone shopping for outright efficiency, see all Lexus fuel economy data.

Tips to maximize efficiency

While the GS F is not inherently fuel-efficient, there are strategies to optimize its MPG without sacrificing too much enjoyment. Avoid aggressive acceleration and hard braking because the GS F’s V8 is responsive, but easing onto the throttle and anticipating stops can significantly reduce fuel consumption, especially in city driving.

Maintain proper tire inflation. Underinflated tires increase rolling resistance, which forces the engine to work harder and consume more fuel. Check your tire pressures regularly, using the recommended settings found on the driver’s side door jamb.

Limit unnecessary weight. Carrying excessive cargo in the trunk or passenger compartment adds weight, impacting fuel economy. Remove any items you don’t need on a regular basis. Even small weight reductions can add up over time.

Use cruise control on the highway. Maintaining a consistent speed helps to optimize fuel consumption. Cruise control minimizes unnecessary acceleration and deceleration, leading to improved MPG on longer trips.

Consider using a lighter-weight synthetic motor oil. The GS F requires 0W-20 synthetic motor oil for proper lubrication and engine health. Using a slightly lighter-weight oil, if permitted by Lexus, could potentially improve fuel economy by a small margin. Consult your owner’s manual or a qualified mechanic for guidance.