2006 Lexus GS430 oil viscosity

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.

INTRODUCTION
508
PARTS AND TOOLS
Here is a list of parts and tools you will need to perform
do−it−yourself maintenance. Remember all Lexus parts are
designed in metric sizes, so your tools must be metric.
Checking the engine oil level
Parts (if level is low):
“Toyota Genuine Motor Oil” or equivalent
Oil grade: API grade SL “Energy −Conserving” or ILSAC
multigrade engine oil. For recommended oil viscosity, see
page 525.
Tools:
 Rag or paper towel
 Funnel (only for adding oil)
Checking the engine coolant level
Parts (if level is low):
”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.
“Toyota Super Long Life Coolant” is a mixture of 50%
coolant and 50% deionized water (for the U.S.A.) or 55% of
coolant and 45% deionized water (for Canada).
Tools:
 Funnel (only for adding coolant)
Checking brake fluid
Parts (if level is low):
FMVSS No. 116 DOT 3 or SAE J1703 brake fluid
Tools:
 Funnel (only for adding fluid)
Checking battery condition
Tools:
Warm water
 Baking soda
 Grease
 Conventional wrench (for terminal clamp bolts)

62L042
Outside temperature
ENGINE
513
– LUBRICATION SYSTEM
Oil capacity Drain and refillwith filter
without filter
5.1 L (5.4 qt., 4.5 lmp.qt.)
4.5 L (4.8 qt., 4.0 lmp.qt.)
Oil gradeAPI grade SL “Energy− Conserving” or ILSAC multigrade engine oil
Recommended oil viscosity5W−30
NOTE:
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus approved “T oyota Genuine Motor Oil” or equivalent to satisfy
the above grade and viscosity. Please contact your Lexus dealer for further details.

62L042
Outside temperature
ENGINE
516– LUBRICATION SYSTEM
Oil capacity Drain and refillTw o −wheel drive models
with filter
without filter
Four− wheel drive models
with filter
without filter
6.3 L (6.6 qt., 5.5 lmp.qt.)
5.9 L (6.2 qt., 5.1 lmp.qt.)
6.4 L (6.7 qt., 5.6 lmp.qt.)
6.0 L (6.3 qt., 5.2 lmp.qt.)
Oil gradeAPI grade SL “Energy− Conserving” or ILSAC multigrade engine oil
Recommended oil viscosity5W−30
NOTE:
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus approved “T oyota Genuine Motor Oil” or equivalent to satisfy
the above grade and viscosity. Please contact your Lexus dealer for further details.

ENGINE
521
The amount of engine oil consumed depends on the
viscosity of the oil, the quality of the oil and the way the
vehicle is driven.
More oil is consumed under driving conditions such as high
speeds and frequent acceleration and deceleration.
A new engine consumes more oil, since its pistons, piston rings
and cylinder walls have not become conditioned.
Oil consumption: Max. 1.0 L per 1000 km (1.1 qt./600 miles,
0.9 lmp·qt./600 miles).
When judging the amount of oil consumption, keep in
mind that the oil may have become diluted, making it
difficult to judge the true level accurately.
For example, if a vehicle is used for repeated short trips and
consumes a normal amount of oil, the dipstick may not show
any drop in the oil level at all, even after 1000 km (600 miles)
or more. This is because
the oil is gradually becoming diluted
with fuel or moisture, making it appear that the oil level has not
changed.
The diluting ingredients evaporate out when the vehicle is then
driven at high speeds, as on an expressway, making it appear
that oil is excessively consumed after driving at high speeds.
Importance of engine oil level check
One of the most important points in proper vehicle
maintenance is to keep the engine oil at the optimum level so
that oil function will not be impaired. Therefore, it is essential
that the oil level be checked regularly. Lexus recommends that
the oil level be checked every time you refuel the vehicle.
NOTICE
Failure to check the oil level regularly could lead to
serious engine trouble due to insufficient oil.
For detailed information on oil level check, see ”Checking the
engine oil level” on page 522.

ENGINE
525
NOTICE
Be careful not to spill engine oil on the vehicle
components.
 Avoid overfilling, or the engine could be damaged.
 Check the oil level on the dipstick once again after
adding the oil.
Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use
Lexus approved “Toyota Genuine Motor Oil” or equivalent to
satisfy the following grade and viscosity.
Oil grade: API grade SL “Energy −Conserving” or ILSAC
multigrade engine oil.
Recommended viscosity: 5W−30
62L042
Outside temperature
SAE 5W30 is the best choice for good fuel economy, and
good starting in cold weather.
If SAE 5W30 is not available, SAE10W30 may be used.
However, it should be replaced with 5W30 at the next oil
change.

ENGINE
526
Oil identification marks
62L038
API Service Symbol ILSAC Certification Mark
Either or both API registered marks are added to some oil
containers to help you select the oil you should use.
 The API Service Symbol is located anywhere on the outside
of the container.
The top portion of the label shows the oil quality by API
(American Petroleum Institut e) designation such as SL.
The center portion of the label shows the SAE viscosity
grade such as SAE 5W −30. ”Energy− Conserving”, shown
in the lower portion, indicates that the oil has fuel −saving
capabilities.
 The ILSAC (International L ubricant Standardization and
Approval Committee) Certification Mark is displayed on the
front of the container. To ensure excellent lubrication for your engine, “Toyota
Genuine Motor Oil” is available, which has been specifically
tested and approved for all Lexus engines.
Please contact your Lexus deal
er for further details about
“Toyota Genuine Motor Oil”.

CHASSIS
532
SPECIFICATIONS (GS430)
– DIFFERENTIALOil capacity
1.35 L (1.42 qt., 1.19 lmp.qt.)
Oil type and viscosityToyota Genuine Differential Synthetic gear oil
API GL− 5 SAE 75W− 90 or its equivalent
NOTE:
The following label is affixed on the right side of the
differential carrier. Use the type and viscosity shown on
the label when the differential oil is replaced.
Synthetic oil information labelNOTICE
Use of differential oil other than “Toyota Genuine
Differential Synthetic gear oil API GL5 SAE 75W90” or its
equivalent may damage the dif ferential gear of your vehicle
and diminish fuel efficiency. For the reasons mentioned
above, Lexus recommends use of “Toyota Genuine
Differential Synthetic gear oil API GL5 SAE 75W90”.
Another differential oil of matching quality can also be
used, (but note that despite the similarity in nomenclature
between “Toyota Genuine Differential Synthetic gear oil
API GL5 SAE 75W90” and oils that meet SAE 75W90
specifications, compliance with the SAE specification
does not guarantee that an oil has all characteristic
required to avoid the problem described above.) If you are
unable to locate an equivalent to “Toyota Genuine
Differential Synthetic gear oil API GL5 SAE 75W90”,
contact your Lexus dealer for further details or another
duly qualified and equipped professional.