Lexus IS 300 — All Years
| Year | Engine | Fuel | MPG (UK) | NHTSA |
|---|---|---|---|---|
| 2024 | 3.5L 6-cyl | Premium Gasoline | 30 | 5★ |
| 2023 | 3.5L 6-cyl | Premium Gasoline | 30 | 5★ |
| 2022 | 3.5L 6-cyl | Premium Gasoline | 30 | 5★ |
| 2021 | 3.5L 6-cyl | Premium Gasoline | 30 | 5★ |
| 2020 | 3.5L 6-cyl | Premium Gasoline | 29 | 5★ |
| 2019 | 3.5L 6-cyl | Premium Gasoline | 29 | — |
| 2018 | 3.5L 6-cyl | Premium Gasoline | 31 | — |
| 2017 | 3.5L 6-cyl | Premium Gasoline | 25 | — |
| 2016 | 3.5L 6-cyl | Premium Gasoline | 25 | — |
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