Toyota 2008 Prius Quick Reference Manual page 491

6-1. Specifications
Lubrication system
Oil capacity
(drain and refill)
with filter
without filter
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 as its oper-
ating temperature. An oil with a higher viscosity may be better suited
if the vehicle is operated at high speeds, or under extreme load con-
dition.
466
PRIUS_U_(L/O_0802)
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.
Outside temperature