2008 Toyota Highlander Owners Manual - Page 557

6-1. Specifications Ignition system Spark plug Make Gap DENSO FK20HR11 0.043 in. (1.1 mm) NOTICE n Iridium-tipped spark plugs Use only iridium-tipped spark plugs. Do not adjust gap when tuning engine. Electrical system Battery 12.6 ⎯ 12.8 V Fully charged 12.2 ⎯ 12.4 V Half charged 11.8 ⎯ 12.0 V Discharged (*: Voltage is checked 20 minutes after the engine and all the lights are turned off) 5 A max. Open voltage* at 68°F (20°C): Charging rates Rear differential (4WD models) 6 Oil capacity Oil type Recommended oil viscosity 1.0 qt. (0.9 L, 0.8 Imp.qt.) Vehicle specifications Hypoid gear oil API GL-5 Above 0°F (-18°C): SAE 90 Below 0°F (-18°C): SAE 80W or 80W-90 531