The 2024 Lexus IS 300’s 2.0L turbocharged four-cylinder engine gets 25 MPG combined, a figure that balances sporty performance with everyday usability. It’s not going to win any hypermiling contests, but for buyers drawn to the IS’s sharp styling, comfortable interior, and Lexus reputation, it’s an acceptable compromise in a segment where performance and luxury are often prioritized over outright fuel efficiency.

City and highway performance

The EPA estimates the IS 300 2.0L will achieve 21 MPG in the city and 31 MPG on the highway. That difference reflects the engine’s tuning and the eight-speed automatic transmission’s gearing. In urban driving, expect the turbocharger to spool up frequently, adding responsiveness when moving through traffic. The highway number shows the benefits of a modern, direct-injected engine and a relatively slick aerodynamic profile, rewarding those who use the IS 300 for longer commutes or road trips. The eight-speed automatic (S8) helps maintain optimal engine speed, whether you are in stop-and-go traffic or cruising at 75 mph with the adaptive cruise control engaged.

Annual fuel cost

The EPA calculates the annual fuel cost for the 2024 Lexus IS 300 2.0L at $2,300. This figure is based on driving 15,000 miles per year with a mix of city and highway conditions, using the national average fuel price. Individual fuel costs will vary depending on driving habits, local fuel prices, and the actual percentage of city versus highway miles driven. Hard acceleration and frequent hard braking will negatively impact fuel economy, while a gentle driving style and consistent highway speeds will improve it.

Real-world expectations

Expect real-world MPG to fluctuate somewhat from the EPA estimates. The IS 300’s turbocharged engine is responsive, and enjoying its power will reduce fuel economy. Driving style is key. Owners who prioritize smooth acceleration and anticipate traffic flow will likely see numbers closer to the EPA’s, while those who frequently exploit the engine’s boost will see lower figures. Weather conditions also play a role; cold temperatures and winter blends of gasoline can reduce fuel efficiency. Tire pressures also affect efficiency.

How it compares

The 2024 Lexus IS 300’s MPG is competitive within its class, but it’s essential to put it in perspective. The Acura TLX with its standard 2.0L turbo engine manages 25 MPG combined, mirroring the Lexus, but it tends to offer a more performance-oriented driving experience. The BMW 330i, a perennial benchmark, achieves 28 MPG combined thanks to its efficient turbo-four. Meanwhile, the Mercedes-Benz C300, another strong contender, gets 28 MPG combined. Drivers considering Lexus fuel economy data should look at other models in the lineup if fuel efficiency is their primary concern. For those specifically interested in the IS MPG across all years, there might be slightly more efficient powertrain options from earlier model years to consider.

Tips to maximize efficiency

The IS 300 2.0L responds well to a light foot on the accelerator. Avoid aggressive starts and sudden acceleration. Gentle acceleration allows the turbocharger to operate more efficiently, using less fuel to reach and maintain desired speeds. Use the throttle smoothly, and anticipate traffic conditions to minimize unnecessary braking and acceleration.

Use the IS 300’s drive modes. The “Eco” mode changes the throttle response and transmission shift points to prioritize fuel efficiency. While it might slightly reduce responsiveness, it can have a noticeable impact on fuel consumption, especially during city driving. Experiment with the different drive modes to find a balance between performance and efficiency that suits your driving style.

Maintain proper tire pressure. Under-inflated tires increase rolling resistance, which reduces fuel economy. Check your tire pressure regularly and inflate them to the recommended levels, which are typically found on a sticker inside the driver’s side doorjamb or in the owner’s manual. Ensuring proper tire pressure not only improves fuel efficiency but also enhances handling and tire life.

Minimize idling. Idling consumes fuel without covering any distance. If you anticipate waiting for more than a minute, turn off the engine. Modern engines are designed to restart quickly and efficiently, and the fuel saved by avoiding prolonged idling adds up over time, especially during city driving and stop-and-go traffic.

Plan your trips strategically. Combine errands into single trips to minimize cold starts. Cold starts are less fuel-efficient than driving a warm engine. Planning routes that avoid congested areas and stop-and-go traffic can also significantly improve fuel efficiency. Using navigation systems to find the most efficient routes can help optimize your trips.