Lexus GS 350 Owner's Manual page 615

614
8-1. Specifications
Recommended viscosity (SAE):
If you use SAE 10W-30 or a higher
viscosity engine oil in extremely low
temperatures, the engine may
become difficult to start, so SAE
0W-20, 5W-20 or 5W-30 engine
oil is recommended.
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 containers to help
you select the oil you should use.
API Service Symbol
1
Top portion: "API SERVICE SN"
means the oil quality designation by
American Petroleum Institute (API).
Center portion: "SAE 0W-20"
means the SAE viscosity grade.
Lower portion: "Resource-Conserv-
ing" means that the oil has fuel-saving
and environmental protection capa-
bilities.
ILSAC Certification Mark
2
The International Lubricant Specification Advisory Committee (ILSAC) Certifica-
tion Mark is displayed on the front of the container.
GS350_300_GS F_OM_OM30J17E_(GE)
Temperature range anticipated
before next oil change