2004 Lexus IS 300 Owners Manual - Page 347

03 07.09 ENGINE - COOLING SYSTEM Capacity Coolant type 7.5 L (7.9 qt., 6.6 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 - Gap Only UNLEADED 91 (Research octane number 96) or higher DENSO SK16R-P1 1 1.1 mm (0.043 in.) - ELECTRICAL SYSTEM Battery - Open voltage at 20_C (68_F): Charging rates 12.7 V Fully charged 12.3 V Half charged 11.9 V Discharged [Voltage that is checked 20 minutes after the key is removed with all the lights turned off] 5A max. 328