Does the Lexus LS take regular gas?
In most markets, no. The Lexus LS lineup generally requires premium unleaded gasoline with an octane rating of 91 or higher (higher in some regions). Using regular 87 octane can reduce performance and fuel efficiency and may cause engine knock; always check your owner's manual for your exact model year and market.
What octane does the LS require?
The current LS models—particularly the 3.5-liter twin-turbo V6 found in the LS 500 and the related hybrid powertrain in the LS 500h—are tuned for higher-octane fuel. In the United States, Lexus typically recommends premium unleaded gasoline (91 octane or higher). In Europe and other regions, higher-octane grades such as 95–98 RON are commonly specified. Regular gasoline (87 octane) is not the intended fuel and can hamper performance.
Model-by-model octane guidance
Here is a concise guide to octane expectations for the main LS models commonly available in many markets:
- LS 500 — 3.5L twin-turbo V6: Premium unleaded gasoline, 91 octane or higher (US); higher-octane grades often required in European markets.
- LS 500h — Hybrid version using the same turbocharged V6-based platform: Premium unleaded gasoline recommended for best performance and efficiency.
- Older or regional variants (e.g., LS 460/LS 600h): Typically specified premium gasoline; verify the exact octane in your owner’s manual for year and market.
Always follow the octane specification printed in your owner’s manual for your exact model/year and market. Regional variations exist, and the engine mapping is calibrated accordingly.
Practical fueling tips
To avoid reduced performance or potential knocking, observe these fueling guidelines:
- Check the owner’s manual or the fuel label on the fuel door to confirm the required octane for your vehicle and market.
- Use the recommended premium gasoline (91 octane or higher in the U.S.; 95–98 RON typically in Europe or other regions).
- Avoid refueling with lower-octane fuel than specified; if you accidentally use regular gas, avoid sustained high-load driving and consider consulting a dealer if you notice knocking or degraded performance.
Meeting the recommended octane helps preserve engine performance, smoothness, and long-term reliability.
Regional octane references
For quick reference across common markets:
- United States/Canada: Premium unleaded gasoline, typically 91 octane (AKI) or higher.
- Europe/UK: Premium grades usually 95–98 RON; verify local labeling and octane scale.
Note: Always use the octane grade specified in your region’s service manual or fuel labeling, as ratings and labeling can differ by country.
Summary
The Lexus LS is engineered to run on premium gasoline. In the United States and many other markets, 91 octane or higher is recommended to preserve performance, efficiency, and longevity. Regular 87 octane is not advised for the LS’s turbocharged and high-compression powertrains. Always consult your owner’s manual for your exact model-year and market, and adhere to the octane requirements to ensure optimal operation.
