Toyota RAV4 2013 Owner's Manual page 488

486
8-1. Specifications
Oil viscosity (0W-20 is explained here as an example):
• The 0W in 0W-20 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 20 in 0W-20 indicates the viscosity characteristic of the oil
when the oil is at high temperature. An oil with a higher viscosity
(one with a higher value) may be better suited if the vehicle is
operated at high speeds, or under extreme load conditions.
How to read oil container labels:
Either or both API registered marks are added to some oil contain-
ers to help you select the oil you should use.
API Service Symbol
1
Top portion: The oil quality des-
ignation
Petroleum Institute) (SN)
Center portion: The SAE viscos-
ity grade (SAE 0W-20)
Lower portion: "Resource-con-
serving" means that the oil has
fuel saving and environmental
protection capabilities.
ILSAC Certification Mark
2
The ILSAC (International Lubri-
cant Standardization
Approval Committee) Certifica-
tion Mark is displayed on the
front of the container.
by API (American
and