Lexus RX 450h Owner's Manual page 568

566 8-1. Specifications
15W-40:
API grade SL, SM, SN or SN PLUS
multigrade engine oil
Recommended viscosity (SAE):
Temperature range anticipated
A
before next oil change
If you use SAE 10W-30 or a higher vis-
cosity engine oil in extremely low tem-
peratures, the engine may become
difficult to start, so SAE 0W-20,
5W-20 or 5W-30 engine oil is recom-
mended.
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 vis-
cosity 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
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the vehicle is operated at high
speeds, or under extreme load con-
ditions.
How to read oil container labels:
Either or both API registered marks
are added to some oil containers to
help you select the oil you should use.
API Service Symbol
A
Top portion: "API SERVICE SN" means the
oil quality designation by American Petro-
leum Institute (API).
Center portion: "SAE 0W-20" means the
SAE viscosity grade.
Lower portion: "Resource-Conserving"
means that the oil has fuel-saving and envi-
ronmental protection capabilities.
ILSAC Certification Mark
B
The International Lubricant Specification
Advisory Committee (ILSAC) Certifica-
tion Mark is displayed on the front of the
container.