2009 Lexus IS F Owners Manual - Page 400

6-1. Specifications Lubrication system Oil capacity (drain and refill) without filter with filter Oil grade 8.7 qt. (8.2 L, 7.2 lmp.qt.) 9.8 qt. (9.3 L, 8.2 lmp.qt.) ILSAC multi-grade engine oil Use Lexus approved "Toyota Genuine Motor Oil" or equivalent to satisfy the grade and viscosity shown below. Recommended oil viscosity Outside temperature *:5W-30 is an oil that provides optimal levels of fuel efficiency. Oil viscosity l The 5W portion of the oil viscosity rating indicates the characteristic of the oil which allows cold startability. Oils with a lower value before the W allow for easier starting of the engine in cold weather. l The 30 in 5W-30 indicates the oil viscosity when the oil is at its operating temperature. An oil with a higher viscosity may be better suited if the vehicle is operated at high speeds, or under extreme load condition. 406