What is the gas mileage on a Lexus IS300h?
The Lexus IS300h’s official combined fuel economy sits in the low-to-mid 50s mpg range in UK figures, roughly 50–60 mpg in US terms, depending on the market and test cycle. The model is a hybrid designed primarily for European and other markets, and real-world mileage varies with driving style and conditions.
How the IS300h mpg is measured
Testing cycles differ by market and era. European WLTP figures tend to be more realistic than older tests, and U.S. EPA ratings do not apply in the same way because the IS300h was not broadly sold in the United States under this name. When comparing, note that the same hybrid system can yield different numbers under different test procedures and driving conditions.
Official figures by market
Below are typical combined fuel-economy ranges reported for common IS300h configurations, with the understanding that real-world results vary by wheel size, trim, and driving style.
- Europe and other WLTP markets: roughly 4.0–4.6 L/100 km, which translates to about 50–60 mpg (US terms) or around 52–58 mpg (UK terms) depending on equipment and tires.
- United Kingdom (official WLTP): approximately 52–58 mpg UK combined, varying with tyre size and driving conditions.
- United States: not offered as IS300h in the U.S. market; no EPA combined rating exists for this model in that region. Comparisons would involve other Lexus hybrids or gasoline IS variants.
Conclusion: The IS300h’s efficiency is competitive for a mid-size hybrid sedan in its primary markets, with WLTP figures reflecting its hybrid setup and real-world results dependent on driving behavior.
Real-world mileage and factors
Actual mileage in daily use depends on several factors, including driving speed, terrain, climate control usage, and how often the car operates in electric mode. Real-world observations typically place mixed driving in the mid-50s mpg region in the UK, with highway cruising tending to pull numbers higher and stop-and-go city driving pulling them lower.
Practical tips can help maximize efficiency: maintain steady speeds, anticipate traffic to smooth acceleration and braking, keep tires properly inflated, minimize heavy HVAC use, and select Eco or EV modes when appropriate for short trips.
Tips to maximize IS300h efficiency
- Drive smoothly: steady acceleration and gradual braking reduce energy usage.
- Keep tires inflated to the recommended pressure to reduce rolling resistance.
- Use Eco mode and, for short trips, EV mode to prioritize electric-drive when appropriate.
- Plan routes to minimize stops; use cruise control on highways when safe and suitable.
- Schedule regular maintenance, including air and cabin filters, to maintain efficiency.
Conclusion: The IS300h provides solid hybrid efficiency for its class, especially in markets using WLTP testing, with real-world results highly influenced by driving habits and conditions.
Summary
The Lexus IS300h typically delivers combined fuel economy in the mid-50s mpg range in its primary European markets (WLTP), roughly 50–60 mpg in US terms depending on the cycle used. Availability varies by region, and real-world mileage depends on driving style, conditions, and load. For the most accurate figure, check the specific model year and market data for your vehicle.
Note: Always verify exact figures for your country and model year, as manufacturers update powertrains and testing standards over time.
