24 MPG combined is not particularly exciting, but it’s what the 2020 Lexus IS 300 2.0L delivers and what its target demographic accepts. This isn’t a car purchased for segment-leading efficiency; it’s acquired for its Lexus refinement, distinctive styling, and the reassurance of Toyota reliability. The IS 300 buyer prioritizes a composed ride, a well-appointed interior, and the Lexus badge over saving every last mile from a gallon.

City and highway performance

The EPA estimates for the 2020 Lexus IS 300 2.0L reveal a split personality, reflective of its intended usage. The city MPG rating of 21 MPG highlights the engine’s struggle in stop-and-go traffic, where the 8-speed automatic transmission works hard to keep the 2.0L turbocharged four-cylinder in its optimal power band. However, on the open road, the IS 300 is better. The highway MPG figure of 30 MPG demonstrates the engine’s ability to cruise comfortably and efficiently at sustained speeds. This makes it a decent choice for those who rack up highway miles commuting or taking weekend trips.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2020 Lexus IS 300 2.0L is exactly $2,400. This figure is based on driving 15,000 miles per year, with a mix of city and highway driving, using the national average fuel price at the time of calculation. This annual cost provides a standardized metric for comparing the IS 300’s fuel consumption to other vehicles, but individual expenses will vary depending on personal driving habits and fluctuations in fuel prices.

Real-world expectations

Fuel economy often differs from EPA estimates. Aggressive driving, frequent short trips, and extreme weather conditions can all negatively impact the IS 300’s MPG. Data from owners suggests that achieving the advertised 30 MPG on the highway is possible with a light foot, but maintaining 21 MPG in the city requires effort. Expect to see numbers closer to the combined 24 MPG figure in mixed driving conditions day to day. For additional data, consult IS MPG across all years.

How it compares

The 2020 Lexus IS 300 2.0L’s fuel economy is similar to its competitors. The BMW 330i, for example, has a slightly higher combined MPG of 28 MPG, making it a more efficient choice for those prioritizing fuel savings. The Audi A4 matches the BMW 330i at 28 MPG combined. On the other hand, the Mercedes-Benz C 300, another direct competitor, achieves a combined MPG of 25, placing it slightly above the IS 300. These subtle differences may not be a deciding factor for most Lexus buyers, who value the brand’s unique blend of luxury and reliability and want access to all Lexus fuel economy data.

Tips to maximize efficiency

Gentle acceleration is key to maximizing fuel economy in the IS 300. The turbocharged engine responds well to smooth throttle inputs, allowing the transmission to upshift earlier and keep the engine in its most efficient rev range. Avoid aggressive acceleration and sudden braking whenever possible to conserve fuel.

Proper tire inflation can also make a noticeable difference. Check the tire pressure regularly and maintain it at the recommended level, typically found on a sticker inside the driver’s side doorjamb. Underinflated tires increase rolling resistance, forcing the engine to work harder and consume more fuel.

Reduce unnecessary weight inside the vehicle. Excess cargo in the trunk or cabin adds to the vehicle’s overall weight, which negatively impacts fuel economy. Remove any items that aren’t essential for your daily driving, such as sporting equipment or tools, to lighten the load.

Use cruise control on the highway. Maintaining a consistent speed with cruise control helps to optimize fuel consumption, particularly on long trips. It prevents acceleration and deceleration, which can waste fuel. If possible, avoid using cruise control in hilly terrain, as the transmission may frequently downshift, negating some of the fuel-saving benefits.

Consider using the “Eco” driving mode, if equipped. This mode adjusts various vehicle parameters, such as throttle response and climate control settings, to prioritize fuel efficiency. While it may slightly reduce performance, it can contribute to fuel savings over time, especially in city driving.