2006 Lexus GX 470 Owners Manual - Page 529

ENGINE - COOLING SYSTEM Capacity Coolant type 12.9 L (13.6 qt., 11.4 Imp. qt.) "Toyota Super Long Life Coolant" or similar high quality ethylene glycol based non−silicate, non−amine, non−nitrite, and non−borate coolant with long−life hybrid organic acid technology (Coolant with long−life hybrid organic acid technology is a combination of low phosphates and organic acids.) Do not use plain water alone. NOTE: "Toyota Super Long Life Coolant" is used in your Lexus vehicle at factory fill. In order to avoid technical problems, only use "Toyota Super Long Life Coolant" or similar high quality ethylene glycol based non−silicate, non−amine, non−nitrite, and non−borate coolant with long−life hybrid organic acid technology. (Coolant with long−life hybrid organic acid technology is a combination of low phosphates and organic acids.) Please contact your Lexus dealer for further details. - FUEL Fuel type Octane rating Unleaded gasoline only 91 (Research octane number 96) or higher 504