engine oil Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2005 PROD. OWNER'S MANUAL (OM30649U)

IMPORTANT INFORMATION ABOUT YOUR LEXUS
ivLexus will not disclose the data recorded in an EDR to a third
party except when:

An agreement from the vehicle’s owner (or the leasing
company for a leased vehicle) is obtained
 Officially requested by the police or other authorities
 Used as a defense for Lexus in a law suit
 Ordered by the court
However, if necessary Lexus will:
 Use the data for research on Lexus vehicle safety
performance
 Disclose the data to a third party for research purposes
without disclosing details of the vehicle owner, and only
when it is deemed necessary
 Disclose summarized data cleared of vehicle identification
information to a non −Lexus organization for research
purposes
New vehicle warranty
Your new vehicle is covered by the following Lexus limited
warranties:
 New vehicle warranty
 Emission control systems warranty
 Others
For further information, please refer to the “Owner’s Guide”,
“Owner’s Manual Supplement” or “Warranty Booklet”.
Your responsibility for maintenance
It is the owner’s responsibility to make sure the specified
maintenance is performed. Section 5 of this Owner’s Manual
gives details of these maintenance requirements. Included in
Section 6 is general maintenance. For scheduled
maintenance information, please refer to the “Owner’s Manual
Supplement / Scheduled Maintenance”.
Important health and safety information about
your Lexus
CAUTION
 WARNING: Engine exhaust, some of its constituents,
and a wide variety of automobile components
contain or emit chemicals known to the State of
California to cause cancer and birth defects and
other reproductive harm. In addition, oils, fuels and
fluids contained in vehicles as well as waste
produced by component wear contain or emit
chemicals known to the State of California to cause
cancer and birth defects or other reproductive harm.
 Battery posts, terminals and related accessories
contain lead and lead compounds. W ash your hands
after handling. Used engine oil contains chemicals
that have caused cancer in laboratory animals.
Always p rotect your skin by washing thoroughly with
soap and water.

KEYS AND DOORS
9

Do not put the electronic key in water or wash it in an
ultrasonic washer.
 Do not keep the electronic key together with the
products emitting electromagnetic waves such as a
cellular phone.
 Do not disassemble the electronic key.
 Do not place the electronic key near electrical
appliances (e.g. television, computer or stereo) or
electrical medical equipment such as low frequency
medical appliances.
 If gasoline, polishing agents or oil adheres to the
electronic key, it may deform or crack over time.
The electronic keys are required to deactivate the engine
immobilizer, and are essential for the engine immobilizer to
function correctly, so be careful not to lose these keys. If you
make your own duplicate key, you will not be able to cancel the
system or start the engine.
To protect items when using valet parking, turn the trunk lid
opener main switch to inoperative or lock the glove box if
necessary, and leave the electronic key (with the mechanical
key removed) with the attendant. For details, see “Trunk lid
opener main switch” on page 126.
If you should lose your electronic keys or if you need additional
electronic keys, duplicates can be made by a Lexus dealer
using the key number.
We recommend writing down the key number and storing it in
a safe place.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
86
Rear Lights System Failure Warning
G13011
If there is a problem in the rear lights system (tail lights,
license plate light, stop lights, rear side marker light, high
mounted stoplight), the master warning light comes on, a
warning tone sounds and the above message appears.
If the above warning message appears, have your vehicle
checked by your Lexus dealer as soon as possible.
 Low Washer Fluid Warning
G13020
When the fluid level in the tank becomes very low, the
master warning light flashes, a warning tone sounds and
the above message appears.
Fill the tank as soon as possible.
 Low Engine Oil Pressure Warning
G13012
When the engine oil pressure becomes too low, the
master warning light flashes, a warning tone sounds and
the above message appears.
If this message appears while you are driving, pull off the road
to a safe place and stop the engine immediately. Call a Lexus
dealer or qualified repair shop for assistance.
The message may appear when the oil level is extremely low.
It is not designed to indicate low oil level, and the oil level must
be checked using the oil level dipstick.
NOTICE
Do not drive the vehicle while this warning message is
displayed even for one block. It may ruin the engine.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
87
Low Engine Oil Level Warning
G13022
When the engine oil level is too low, the master warning
light comes on, a warning tone sounds, and the above
message appears.
Add oil as soon as possible. (For instructions, see “Checking
the engine oil level” on page 522.)
While driving on steep inclines or rough roads which causes
the vehicle to substantially sway or on curves, this message
may appear due to the movement of engine oil in the engine.
In normal conditions, due to engine oil consumption, this
message may a ppear earlier than the specified service interval
of the scheduled maintenance. This is because the engine oil
is consumed to the low level within the scheduled maintenance
interval and does not indicate a problem. (For detailed
information, see “Facts about engine oil consumption” on page
520.)
NOTICE
Continued engine operation with low engine oil will
damage the engine.
 Engine Oil Maintenance Reset Warning (U.S.A.
only)
G13033
This message indicates that the engine oil maintenance
data has been reset. After replacing the engine oil, be sure
to reset the maintenance data.
To reset the data, perform the following operations:
1. Push the “ODO TRIP” switch in the switch box to
change the display to blank.
2. Turn the engine switch off.
3. Turn the engine switch on with the trip meter “RESET”
switch held down.
4. Keep pushing the “RESET” switch for longer than 7
seconds after the engine switch is turned on.
After the above operation, the master warning light comes
on, a warning tone sounds and the above message
appears to inform you that the engine oil maintenance
data has been reset.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
88
Engine Oil Replacement Reminder (U.S.A. only)
G13035
If the driving range exceeds 4,500 miles after the engine
oil maintenance data is reset, the master warning light
comes on, a warning tone sounds and the above message
appears for about 15 seconds when you select the engine
switch in “IGON” mode.
This message indicates that the engine oil should be replaced
soon. If the message appears, it is recommended to inspect
the engine oil with the engine switch off. For details about
inspection, see “Checking the engine oil level” on page 522.
If the engine oil level is low, engine oil should be replaced.
Have it replaced at your Lexus dealer.
After the engine oil replacement, reset the engine oil
maintenance data and make sure the “OIL MAINT RESET”
appears on the display.
NOTICE
The warning message on the display is based on the
driving range after the engine oil maintenance data
reset. This is not based on the monitoring of dirty
condition of the engine oil.
 Engine Oil Replacement Warning (U.S.A. only)
G13034
If the driving range exceeds 5,000 miles after the engine
oil maintenance data is reset, the master warning light
comes on, a warning tone sounds and the above message
appears.
This message indicates that the engine oil should be replaced
as soon as possible. If the message appears, it is
recommended to inspect the engine oil with the ignition off. For
details about inspection, see “Checking the engine oil level” on
page 522.
If the engine oil level is low, engine oil should be replaced.
Have it replaced at your Lexus dealer.
After the engine oil replacement, reset the engine oil
maintenance data and make sure the “OIL MAINT RESET”
appears on the display.
NOTICE
The warning message on the display is based on the
driving range after the engine oil maintenance data
reset. This is not based on the monitoring of dirty
condition of the engine oil.

STARTING AND DRIVING
344
NOTICE
Observe the following instructions, or the engine switch
may not work properly.
 The switch should be operated with your clean finger.
Do not use an oily or dirty finger.
 Be careful not to spill water or other liquid on the
switch.
Do not modify the engine switch without consulting
your Lexus dealer. Doing so may cause system
problem.
Selecting the mode
G31076
“OFF” mode
“ACC” mode
“IG−ON” mode
To select “ACC”, “IGON” or “OFF” mode, press the
engine switch while carrying an electronic key with the
selector lever in the “P” position, and the brake pedal not
depressed.
Each time you press the engine switch, the mode changes in
order of “OFF”, “ACC”, “IG−ON” mode then back to “OFF”
mode.
To start the engine in each mode, push the engine switch while
the brake pedal is depressed. For details, see “Starting the
engine” on page 350.

DRIVING TIPS
452
WINTER DRIVING TIPS
Make sure your coolant is properly protected against
freezing.
Only use ”Toyota Super Long Life Coolant” or similar high
quality ethylene glycol based non−silicate, non −amine,
non− nitrite, and non −borate coolant with long −life hybrid
organic acid technology. (Coolant with long −life hybrid organic
acid technology is a combination of low phosphates and
organic acids.)
See “Checking the engine coolant level” on page 527 for
details of coolant type selection.
For the U.S.A.—“Toyota Super Long Life Coolant” is a mixture
of 50% coolant and 50% deionized water. This coolant
provides protection down to about −35C (− 31F).
For Canada—“Toyota Super Long Life Coolant” is a mixture of
55% coolant and 45% deionized water. This coolant provides
protection down to about −42C (− 44F).
NOTICE
Do not use plain water alone.
Check the condition of the battery and cables.
Cold temperatures reduce the capacity of any battery, so it
must be in top shape to pr ovide enough power for winter
starting. Page 571 tells you how to visually inspect the battery.
Your Lexus dealer and most service stations will be pleased to
check the battery charge level. Make sure the engine oil viscosity is suitable for the cold
weather.
See page 525 for recommended viscosity. Leaving a heavy
summer oil in your vehicle during winter months may cause
harder starting. If you are not sure about which oil to use, call
your Lexus dealer
− they will be pleased to help.
Check the electronic ignition system for loose
connections or obvious damage.
Keep the door locks from freezing.
Squirt lock de −icer or glycerine into the locks to keep them from
freezing.
Use a washer fluid containing an antifreeze solution.
This product is available at your Lexus dealer and most auto
parts stores. Follow the manufacturer’s directions for how
much to mix with water.
NOTICE
Do not use engine antifreeze or any other substitute
because it may damage your vehicle’s paint.
Do not use your parking brake when there is a possibility
it could freeze.
When parking, put the transmission into ”P” and block the front
wheels. Do not use the parking brake, or snow or water
accumulated in and around the parking brake mechanism may
freeze the parking brake, making it hard to release.

DRIVING TIPS
455

Avoid continuous speeding up and slowing down.
Stop−and−go driving wastes fuel.
 Avoid unnecessary stopping and braking. Maintain a
steady pace. Try to time the traf fic signals so you only need
to stop as little as possible or take advantage of through
streets to avoid traffic lights. Keep a proper distance from
other vehicles to avoid sudden braking. This will also
reduce wear on your brakes.
 Avoid heavy traffic or traffic jams whenever possible.
 Do not rest your foot on the brake pedal. This causes
premature wear, overheating and poor fuel economy.
 Maintain a moderate speed on highways. The faster you
drive, the greater the fuel consumption. By reducing your
speed, you will cut down on fuel consumption.
 Keep the front wheels in proper alignment. Avoid hitting
the curb and slow down on rough roads. Improper
alignment not only causes faster tire wear but also puts an
extra load on the engine, which, in turn, wastes fuel.
 Keep the bottom of your vehicle free from mud, etc.
This not only lessens weight but also helps prevent
corrosion. 
Keep your vehicle tunedup and in top shape. A dirty air
cleaner, improper valve clearance, dirty plugs, dirty oil and
grease, brakes not adjusted, etc. all lower engine
performance and contribute to poor fuel economy. For
longer life of all parts and lower operating costs, keep all
maintenance work on schedule, and if you often drive under
severe conditions, see that your vehicle receives more
frequent maintenance (For scheduled maintenance
information, please refer to the “Owner’s Manual
Supplement / Scheduled Maintenance”.)
CAUTION
Never turn off the engine to coast down hills. Your
power steering and brake booster will not function
without the engine running. Also, the emission control
system operates properly only when the engine is
running.

MAINTENANCE
494Battery
Your Lexus has a maintenance free battery. You do not have
to add distilled water. For longer life of the battery, however,
see page 571 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 538 for
additional information.
Engine oil level
Check the level on the dipstick with the engine turned off and
the vehicle parked on a level spot.
See page 522 for additional
information.
Exhaust system
If you notice any change in the sound of the exhaust or smell
exhaust fumes, have the cause located and corrected
immediately. (See “Engine exhaust caution” on page 341.)
Vehicle interior
Items listed below should be checked regularly, e.g. while
performing periodic services, cleaning the vehicle, etc.
Lights
Make sure the headlight, stop lights, tail lights, turn signal
lights, and other lights are working. Check headlight aim.
Service reminder indicators and warning buzzers
Check that all service reminder indicators and warning
buzzers function properly.
Steering wheel
Check that it ha s the specified free play. Be alert for changes
in steering condition, such as hard steering, excessive free
play or strange noise.
Seats
Check that all front seat controls such as seat adjusters,
seatback recliner, etc. operate smoothly. Check that the head
restraints move up and down smoothly and that the locks hold
securely in any latched position.
Seat belts
Check that the seat belt system such as buckles, retractors
and anchors operate properly and smoothly. Make sure the
belt webbing is not cut, frayed, worn or damaged.

MAINTENANCE
495
Accelerator pedal
Check
the pedal for smooth operation and uneven pedal ef fort
or catching.
Brake pedal
Check the pedal for smooth operation and the proper
clearance and free play. Check the brake booster function.
Brakes
In a safe place, check that the brakes do not pull to one side
when applied.
Parking brake
Check that the pedal has the proper travel and that, on a safe
incline, your vehicle is held securely with only the parking
brake applied.
Automatic transmission ”Park” mechanism
On a safe incline, check that your vehicle is held securely with
the selector lever in ”P” position and all brakes released.
Vehicle exterior
Items listed below should be performed from time to time,
unless otherwise specified.
Wheel nuts
When checking the tires, make sure to check the nuts for
looseness. Tighten them if necessary. Fluid leaks
Check
underneath for leaking fuel, oil, water or other fluid after
the vehicle has been parked for a while. If you smell fuel fumes
or notice any leak, have the cause found and corrected
immediately.
Doors and engine hood
Check that all doors, including trunk lid, operate smoothly and
all latches lock securely. Make sure the engine hood
secondary latch secures the hood when the primary latch is
released.
Tire inflation pressure
Check the tire inflation pressure with a gauge every two
weeks, or at least once a month and adjust as shown on
the tire and loading information label. See page 539 for
additional information.
Tire surface
Check the tires carefully for cuts, damage or excessive
wear. See page 554 for additional information.
Tire rotation
Rotate the tires according to the maintenance schedule.
(For scheduled maintenance information, please refer to
the “Owner’s Manual Supplement / Scheduled
Maintenance”.) See page 554 for additional information.