2009 Toyota Prius Owners Manual - Page 489

OM47614U_PRIUS_U.book Page 464 Monday, January 11, 2010 11:02 AM 6-1. Specifications Lubrication system Oil capacity drain and refill with filter without filter Oil grade 3.9 qt. (3.7 L, 3.3 lmp.qt.) 3.6 qt. (3.4 L, 3.0 lmp.qt.) ILSAC multigrade engine oil Use Toyota 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 as 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. 464 PRIUS_U_(OM47614U)