Page 4 of 20

ENGINE
514– COOLING SYSTEM
Capacity
10.1 L (10.7 qt., 8.9 lmp.qt.)
Coolant type”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.)
Do not use plain water alone.
NOTE:
“Toyota Super Long Life Coolant” is used in your Lexus vehicle at factory fill. In order to avoid technical problems, 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.) Do not use plain water alone. Please contact your Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make DENSO
NGK
– Gap
SK20R11
IFR6A11
1.1 mm (0.043 in.)
– ELECTRICAL SYSTEM
Battery – Open voltage at 20C (68F):
– Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the engine switch is off with all
the lights turned off]
5A max.
Page 7 of 20

ENGINE
517 – COOLING SYSTEM
Capacity
9.1 L (9.6 qt., 8.0 lmp.qt.)
Coolant type”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.)
Do not use plain water alone.
NOTE:
“Toyota Super Long Life Coolant” is used in your Lexus vehicle at factory fill. In order to avoid technical problems, 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.) Do not use plain water alone. Please contact your Lexus dealer for further details.
– IGNITION SYSTEM
Spark plug – Make DENSO
NGK
– Gap
FK20HBR11
ILFR6D11T
1.1 mm (0.043 in.)
– ELECTRICAL SYSTEM
Battery – Open voltage at 20C (68F):
– Charging rates
12.7V Fully charged
12.3V Half charged
11.9V Discharged
[Voltage that is checked 20 minutes after the engine switch is off with all
the lights turned off]
5A max.
Page 8 of 20

ENGINE
518
FUEL
Fuel type
Your vehicle must use only unleaded gasoline.
To help prevent gas station mixups, your Lexus has a smaller
fuel tank opening. The special nozzle on pumps with unleaded
fuel will fit it, but the larger standard nozzle on pumps with
leaded gas will not.
At a minimum, the gasoline you use should meet the
specifications of ASTM D4814 in the U.S.A. and CGSB
3.5−M93 in Canada.
NOTICE
Do not use leaded gasoline. Use of leaded gasoline will
cause the three−way catalytic converter to lose its
effectiveness and the emission control system to
function improperly. Also, this can increase
maintenance costs.
Octane rating
Select premium unleaded gasoline with an Octane Rating
of 91 (Research Octane Number 96) or higher for optimum
engine performance. However, if such premium type
cannot be obtained, you may temporarily use unleaded
gasoline with an Octane Rating as low as 87 (Research
Octane Number 91).Use of unleaded fuel with an octane number or rating lower
than stated above will cause persistent heavy knocking. If
severe, this will lead to engine damage.
If your engine knocks ...
If you detect heavy knocking even when using the
recommended fuel, or if you hear steady knocking while
holding a steady speed on level roads, consult your Lexus
dealer.
However, occasionally, you may notice light knocking for a
short time while accelerating or driving up hills. This is normal
and there is no need for concern.
Gasoline containing detergent additives
Lexus recommends the use of gasoline that contains
detergent additives to avoid build−up of engine deposits.
However, all gasoline sold in the U.S. contains detergent
additives to keep clean and/or clean intake systems.
Quality gasoline
Automotive manufacturers in the U.S., Europe and Japan
have developed a specification for quality fuel named
World−Wide Fuel Charter (WWFC) that is expected to be
applied world wide. The WWFC consists of four
categories that depend on required emission levels. In the
U.S., category 3 has been adopted. The WWFC improves
air quality by providing for better emissions in vehicle
fleets, and customer satisfaction through better vehicle
performance.
Page 14 of 20
ENGINE
524
G62006
GS300 (four−wheel drive models)
1
Add oil 2
O.K. 3
Too full
4. Pull the dipstick out and look at the oil level while holding a
rag under the end. If it is between the full level mark (
5
) and
the low level mark ( 4
), it is O.K.
NOTICE
Be careful not to drop engine oil on the vehicle
components.
G62003
GS430GS300
If the oil level is below or only slightly above the low level
mark, add engine oil of the same type as already in the
engine.
Remove the oil filler cap and add engine oil a little at a time,
checking the dipstick. We recommend that you use a funnel
when adding oil. The approximate quantity of oil needed to
raise the level between low and full on the dipstick is indicated
as follows:
1.5 L (1.6 qt., 1.3 lmp. qt.)
For the engine oil capacity, see “Specifications” on pages 512
and 515.
When the level reaches within the correct range, return the
filler cap and turn the cap clockwise until you hear a click.