What kind of gas should you put into the 1994 Lexus Es300 regular middle grade or premium?
Use exactly what the owner's manual states. If you do not have one, you can obtain one from your dealer or a salvage yard. This is word for word what it says in my manual: Fuel selection: Use only UNLEADED fuel, Research Octane No 91 (Octane Rating 87) or higher. For improved vehicle performance, the use of Premium unleaded gasoline with a Research Octance No of 96 (Octane Rating 91) or higher is recommended.