2012 Lexus GS250 service

6946-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)
When replacing wheels (vehicles with the tire pressure warning system)
The wheels of your vehicle are equipped with tire pressure warning valves
and transmitters that allow the tire pressure warning system to provide
advance warning in the event of a loss in tire inflation pressure. Whenever
wheels are replaced, tire pressure warning valves and transmitters must be
installed. (P. 674)
CAUTION
When replacing wheels
Do not use wheels that are a different size from those recommended in the
Owner’s Manual, as this may result in a loss of handling control.
Never use an inner tube in a leaking wheel which is designed for a tube-
less tire. Doing so may result in an accident, causing death or serious
injury.
NOTICE
Replacing tire pressure warning valves and transmitters (vehicles with the
tire pressure warning system)
Because tire repair or replacement may affect the tire pressure warning
valves and transmitters, make sure to have tires serviced by any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional or other qualified service shop. In addition, make sure to
purchase your tire pressure warning valves and transmitters at any autho-
rized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional.
Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with
non-genuine wheels.

6966-3. Do-it-yourself maintenance
GS350/250_EE (OM30C36E)Remove the air conditioning
filter from the filter case and
replace it with a new one.
The “UP” marks shown on the
filter and the filter case should be
pointing up.
Checking interval
Inspect and replace the air conditioning filter according to the maintenance
schedule. In dusty areas or areas with heavy traffic flow, early replacement
may be required. (For scheduled maintenance information, please refer to the
“Lexus Service Booklet” or “Lexus Warranty Booklet”.)
If air flow from the vents decreases dramatically
The filter may be clogged. Check the filter and replace if necessary.
5
NOTICE
When using the air conditioning system
Make sure that a filter is always installed.
Using the air conditioning system without a filter may cause damage to the
system.

7407-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
If your vehicle needs to be towed
The following may indicate a problem with your transmission.
Contact any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional before towing.
The engine is running but the vehicle will not move.
The vehicle makes an abnormal sound.
If towing is necessary, we recommend having your vehicle towed
by any authorized Lexus dealer or repairer, or another duly quali-
fied and equipped professional or a commercial towing service,
using a lift-type truck or flat bed truck.
Use a safety chain system for all towing, and abide by all state/pro-
vincial and local laws.
Before towing

841
8 8-1. Specifications
Vehicle specifications
GS350/250_EE (OM30C36E)How to read oil container labels:
Either or both API registered marks are added to some oil con-
tainers to help you select the oil you should use.
API Service Symbol
Top portion: The oil quality des-
ignation by API (American
Petroleum Institute) (SN)
Center portion: The SAE vis-
cosity grade (SAE 0W-20)
Lower portion: “Resource-Con-
serving” means that the oil has
fuel saving and environmental
protection capabilities.
ILSAC Certification Mark
The ILSAC (International
Lubricant Standardization and
Approval Committee) Certifica-
tion Mark is displayed on the
front of the container.
1
2

843
8 8-1. Specifications
Vehicle specifications
GS350/250_EE (OM30C36E)How to read oil container labels:
Either or both API registered marks are added to some oil con-
tainers to help you select the oil you should use.
API Service Symbol
Top portion: The oil quality des-
ignation by API (American
Petroleum Institute) (SN)
Center portion: The SAE vis-
cosity grade (SAE 10W-30)
Lower portion: “Resource-Con-
serving” means that the oil has
fuel saving and environmental
protection capabilities.
ILSAC Certification Mark
The ILSAC (International
Lubricant Standardization and
Approval Committee) certifica-
tion Mark is displayed on the
front of the container.
1
2

8468-1. Specifications
GS350/250_EE (OM30C36E)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 con-
ditions.
How to read oil container labels:
Either or both API registered marks are added to some oil con-
tainers to help you select the oil you should use.
API Service Symbol
Top portion: The oil quality des-
ignation by API (American
Petroleum Institute) (SN)
Center portion: The SAE vis-
cosity grade (SAE 0W-20)
Lower portion: “Resource-Con-
serving” means that the oil has
fuel saving and environmental
protection capabilities.
ILSAC Certification Mark
The ILSAC (International
Lubricant Standardization and
Approval Committee) Certifica-
tion Mark is displayed on the
front of the container.
1
2