26 MPG combined is a reasonable figure for the 2018 Lexus IS 300 with its 2.0L turbocharged four-cylinder engine. It’s not setting any efficiency records, and other compact luxury sedans offer better numbers, but it’s a compromise many IS buyers are willing to make. This car is aimed at drivers who prioritize a smooth ride, Lexus refinement, and distinctive styling over saving gas. Potential owners often value the lower price point compared to the V6-powered IS 350.

City and highway performance

The EPA estimates for the 2018 Lexus IS 300 2.0L are 22 MPG in the city and 32 MPG on the highway. The city figure reflects stop-and-go traffic, where the small-displacement turbo engine works harder and spends more time off-boost. The highway number is more respectable, achievable because the eight-speed automatic transmission keeps the engine at lower RPMs during steady cruising. The eight-speed automatic is tuned for smooth shifts, which affects fuel economy. Aggressive acceleration will hurt fuel efficiency in both environments.

Annual fuel cost

According to the EPA, the estimated annual fuel cost for the 2018 Lexus IS 300 2.0L is $2,250. This figure is based on driving 15,000 miles per year and using national average fuel prices for premium unleaded gasoline, which is recommended for optimal performance. Individual fuel costs will vary depending on driving habits, local fuel prices, and the actual number of miles driven annually.

Real-world expectations

While the EPA provides a standardized benchmark, real-world fuel economy for the 2018 Lexus IS 300 2.0L can fluctuate. Expect to see figures that are slightly lower than the EPA estimates if you typically drive in congested areas or accelerate frequently. On the other hand, those who primarily drive on the highway with consistent speeds may see results that meet or even exceed the advertised 32 MPG. The car’s driving mode (Eco, Normal, Sport) also has an impact. Sport mode sharpens throttle response at the cost of fuel economy. Eco mode prioritizes fuel efficiency by reducing throttle sensitivity and adjusting climate control settings.

How it compares

The 2018 Lexus IS 300 2.0L faces stiff competition in the compact luxury sedan segment. The BMW 330i, for example, achieves an EPA-rated 28 MPG combined, offering a noticeable advantage in fuel efficiency. Similarly, the Acura TLX with its 2.4L four-cylinder engine manages around 27 MPG combined. The Mercedes-Benz C300 boasts similar numbers to the BMW. The Audi A4 with its 2.0-liter turbo engine is just slightly above the IS at 27 MPG combined. These competitors present alternatives for buyers who want better fuel economy. However, buyers of the IS often cite Lexus’s reputation for reliability, styling, and a comfortable driving experience as reasons to overlook the slight fuel economy difference. You can find all Lexus fuel economy data here.

Tips to maximize efficiency

Use the “ECO” driving mode whenever possible, especially during city driving. This mode adjusts the throttle response and air conditioning settings to prioritize fuel conservation. While it might make the car feel a bit less responsive, the savings can add up. Many IS owners drive exclusively in Eco mode, saving Sport for occasional sprints.

Make sure that your tires are properly inflated. Underinflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended pressure listed on the driver’s side doorjamb. Properly maintained tires also extend their useful lives.

Avoid aggressive acceleration and braking. Smooth and gradual driving conserves fuel. Anticipate traffic flow and maintain a consistent speed whenever possible. Every hard run bleeds fuel, drive smoothly instead to save. If you’re planning a cross-country trip, study IS MPG across all years to prepare.

Reduce unnecessary weight in your vehicle. Extra cargo adds to the vehicle’s overall weight, which reduces fuel economy. Remove any unnecessary items from your trunk and passenger area. Every 100 pounds reduces gas mileage by up to 1-2 percent.

Keep your vehicle properly maintained. Regular maintenance, such as oil changes and air filter replacements, helps to ensure that your engine runs efficiently. A properly maintained engine consumes less fuel.