What kind of gas does a Lexus 350 take?
Lexus 350 models typically require regular unleaded gasoline with an octane rating of 87 AKI or higher, and premium fuel is not required. Higher-octane fuel is generally optional and may not provide a noticeable performance boost for everyday driving. Always verify the exact requirements for your year and model in the owner's manual.
Fuel basics for the Lexus 350
Understanding octane, fuel type, and ethanol content helps you choose the right fuel for reliable performance across common variants like the ES 350, RX 350 and IS 350.
- Octane requirement: Use regular unleaded gasoline rated at 87 AKI or higher. The engine is designed to run efficiently on 87, and higher-octane fuel is optional and not required for most trims.
- Fuel type: Gasoline only. Diesel or other alternative fuels are not supported unless explicitly specified for a particular variant.
- Ethanol content: In the United States and many markets, regular gasoline is commonly E10 (up to 10% ethanol). Check local fuel labels and regulations; avoid blends beyond what the manual allows.
This summarizes the general guidance that applies to the majority of Lexus 350 models. Always confirm any exceptions for your exact year and trim.
Model-specific notes
There are year-by-year and trim-by-trim differences, but the core fuel requirements are shared across the main 350 variants: ES 350, RX 350 and IS 350.
- ES 350: Regular unleaded gasoline with 87 AKI or higher; premium is not required for normal operation.
- RX 350: Regular unleaded gasoline with 87 AKI or higher; using higher-octane fuel is optional and typically yields no significant performance gain.
- IS 350: Regular unleaded gasoline with 87 AKI or higher; premium fuel is not necessary for everyday driving.
When in doubt, consult the owner’s manual or a Lexus dealer for model-year-specific notes, especially in regions with different fuel standards or engine calibrations.
Practical fueling tips
To maintain reliability and performance, follow the recommended octane and fuel type, keep fuel fresh, and avoid frequent changes between fuels with very different octane ratings. If you have specific driving needs or encounter knocking or performance issues, contact a Lexus service professional for guidance.
Summary
Across the common Lexus 350 lineup—including the ES 350, RX 350 and IS 350—the standard fuel is regular unleaded gasoline with an octane rating of 87 AKI or higher. Premium fuel is not required, and in most cases does not provide a meaningful performance advantage. In the United States, regular fuel is typically E10 in most stations, but always verify the local fuel label and your vehicle’s manual for any exceptions or regional notes. For precise guidance, refer to your year-specific owner’s manual or your local Lexus dealership.
