Lexus 2008 IS250 Owner's Manual page 406

6-1. Specifications
Lubrication system
Oil capacity
(drain and refill)
with filter
2WD models
AWD models
without filter
2WD models
AWD models
Oil grade
Recommended oil
viscosity
*
: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.
410
IS250
6.6 qt. (6.3 L, 5.5 lmp.qt.)
6.8 qt. (6.4 L, 5.7 lmp.qt.)
6.2 qt. (5. 9 L, 5.2 lmp.qt.)
6.3 qt. (6.0 L, 5.3 lmp.qt.)
ILSAC multi-grade engine oil
Use Lexus approved "Toyota Genuine Motor Oil" or
equivalent to satisfy the grade and viscosity shown
below.
Outside temperature
IS350
6.6 qt. (6.3 L, 5.5 lmp.qt.)
6.2 qt. (5. 9 L, 5.2 lmp.qt.)