2004 Lexus GX 470 User Guide 2 - Page 509

ENGINE - COOLING SYSTEM Capacity Coolant type 12.9 L (13.6 qt., 11.4 lmp.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 Do not use plain water alone. NOTE: "Toyota Super Long Life Coolant" is filled 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. Please contact your Lexus dealer for further details. - FUEL Fuel type Octane rating - IGNITION SYSTEM Spark plug - Make DENSO NGK - Gap - ELECTRICAL SYSTEM Battery Open voltage at 20_C (68_F): 12.6 - 12.8 V Fully charged 12.2 - 12.4 V Half charged 11.8 - 12.0 V Discharged [Voltage that is checked 20 minutes after the key is removed with all the lights turned off] 5A max. 509 SK20R11 IFR6A11 1.1 mm (0.043 in.) Only UNLEADED 87 (Research octane number 91) or higher Charging rates