2009 Lexus GS 450h Owners Manual - Page 624

6-1. Specifications Lubrication system Oil capacity Drain and refill (Reference) With filter Without filter 6.6 qt. (6.3 L, 5.5 Imp.qt.) 6.2 qt. (5.9 L, 5.2 Imp.qt.) n Engine oil selection "Toyota Genuine Motor Oil" is used in your Lexus vehicle. Use Lexus approved "Toyota Genuine Motor Oil" or equivalent to satisfy the following grade and viscosity. Oil grade: ILSAC multigrade engine oil Recommended viscosity: SAE 5W-30 SAE 5W-30 is the best choice for good fuel economy and good starting in cold weather. If SAE 5W-30 is not available, SAE 10W-30 oil may be used. However, it should be replaced with SAE 5W-30 at the next oil change. Outside temperature 6 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. 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 conditions. Vehicle specifications 567 GS_HV_U (OM30B44U) March 8, 2010 10:03 am