How many miles per gallon does a Lexus IS 300 hybrid get?
In markets where the IS 300h is offered, combined fuel economy is typically around 50–60 mpg on WLTP testing, with no official EPA rating in the U.S. because the hybrid wasn’t sold there. The actual numbers vary by market and driving conditions.
The Lexus IS 300 hybrid (often listed as the IS 300h in many regions) pairs a 2.5-liter Atkinson-cycle petrol engine with an electric motor to deliver a balance of efficiency and performance. This article outlines the mpg figures you can expect, how they differ by market, and tips to maximize fuel economy in real-world driving.
Fuel economy by market
Prices, test cycles, and market availability influence the mpg figures for the IS 300h. The following figures are representative ranges you’ll see in markets where the model has been offered.
- Europe (WLTP, combined): 4.3–4.6 L/100km, roughly 51–55 mpg (US gallons equivalent).
- United Kingdom (Imperial mpg): typically around 60–62 mpg (imperial), depending on driving conditions and trim.
- Other regions (WLTP or equivalent): similar ranges around 4.2–4.7 L/100km, about 50–57 mpg (US).
Note: Official numbers can vary by model year, trim, and testing cycle. Real-world mpg often differs from lab results due to driving style, terrain, and climate control use.
Maximizing mpg in the IS 300h
To get the best possible fuel economy from the IS 300h, consider the following practical practices.
- Drive smoothly: gradual acceleration and steady speeds reduce energy use and maximize regeneration.
- Use hybrid or ECO modes to prioritize efficiency, especially at lower speeds or highway cruising.
- Avoid unnecessary idling and short trips; allow the hybrid system to warm up and optimize engine use.
- Keep tires inflated to the recommended pressure; under-inflated tires increase rolling resistance.
- Minimize load and roof rack use; extra weight and aero drag can lower efficiency.
- Schedule regular maintenance and brakes inspection to maintain optimal hybrid system performance.
With mindful driving and proper maintenance, you can approach the upper end of the published ranges, though real-world results will vary.
Is the IS 300 hybrid a plug-in?
No. The IS 300h (IS 300 hybrid) is a self-charging hybrid that uses the gasoline engine and regenerative braking to charge its battery. There is no plug-in version of the IS 300h in the mainstream IS lineup.
Summary
The Lexus IS 300 hybrid aims for efficient, all-around performance rather than a dedicated plug-in experience. In markets where it was sold, combined fuel economy typically falls in the 50–60 mpg range on WLTP testing (roughly 51–55 mpg in US units), with variations by year, market, and driving conditions. The vehicle is not offered with EPA ratings in the U.S., and real-world mpg will depend on driving style and conditions. To maximize efficiency, drive smoothly, use hybrid modes, maintain proper tire pressure, and minimize excess weight and energy-using ancillary systems.
