What kind of gas should you put in a Lexus is300?

The Lexus IS300 typically requires premium unleaded gasoline with an octane rating of 91 or higher for optimal performance and efficiency. While it may run on regular unleaded gasoline (87 octane), using a lower octane can lead to reduced engine performance and efficiency, as well as potential knocking. Always check the owner's manual for specific recommendations based on the model year.