2013 Lexus GS300h engine

9288-1. Specifications
GS450h_300h_OM_OM30D53E_(EE)
Engine number
The engine number is stamped on the engine block as shown.
GS300h
GS450h
GS300hGS450h
Engine
Model2AR-FSE
Ty p e4-cylinder in line, 4-cycle, gasoline
Bore and stroke90.0  98.0 mm (3.54  3.86 in.)
Displacement2494 cm3 (152.2 cu.in.)
Valve clearanceAutomatic adjustmentDrive belt tension
Model2GR-FXE
Ty p e6-cylinder V type, 4-cycle, gasoline
Bore and stroke94.0  83.0 mm (3.70  3.27 in.)
Displacement3456 cm3 (210.9 cu.in.)
Valve clearanceAutomatic adjustmentDrive belt tension

9308-1. Specifications
GS450h_300h_OM_OM30D53E_(EE)
*: The engine oil capacity is a reference quantity to be used when changing
the engine oil. Warm up the engine and turn off the hybrid system, wait
more than 5 minutes, and check the oil level on the dipstick.
Hybrid battery (traction battery)
Ty p eNickel-Metal hydride battery
Vo l t a g e7.2 V/module
Capacity6.5 Ah (3HR)
QuantityGS300h32 modules
GS450h40 modules
Overall voltageGS300h230.4 V
GS450h288 V
Lubrication system
Oil capacity
(Drain and refill 
reference
*)
With filter
Without filter
GS300hGS450h
4.5 L (4.8 qt., 4.0 lmp.
qt.)
4.1 L (4.3 qt., 3.6 lmp.
qt.)6.2 L (6.6 qt., 5.5
Imp.qt.)
5.9 L (6.2 qt., 5.2
Imp.qt.)

931
8 8-1. Specifications
Vehicle specifications
GS450h_300h_OM_OM30D53E_(EE)
Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle.
Lexus recommends the use of approved “Toyota Genuine Motor
Oil”. Another motor oil of matching quality can also be used.
Oil grade:
0W-20, 5W-20, 5W-30 and 10W-30:
API grade SL “Energy-Conserving”, SM “Energy-Conserving”
or SN “Resource-Conserving”; or ILSAC multigrade engine oil
15W-40 and 20W-50:
API grade SL, SM or SN multigrade engine oil
Recommended viscosity (SAE):
SAE 0W-20 is filled into your
Lexus vehicle at manufactur-
ing, and the best choice for
good fuel economy, and good
starting in cold weather.
If SAE 0W-20 oil is not avail-
able, SAE 5W-30 oil may be
used. However, it should be
replaced with SAE 0W-20 at
the next oil change.
If you use SAE 10W-30 or a
higher viscosity engine oil in
extremely low temperatures,
the engine may become diffi-
cult to start, so SAE 0W-20,
5W-20 or 5W-30 engine oil is
recommended.
Temperature range anticipated
before next oil changePreferred

9328-1. Specifications
GS450h_300h_OM_OM30D53E_(EE)
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: “API SERVICE
SN” means the oil quality desig-
nation by American Petroleum
Institute (API).
Center portion: “SAE 0W-20”
means the SAE viscosity grade.
Lower portion: “Resource-Con-
serving” means that the oil has
fuel-saving and environmental
protection capabilities.
ILSAC Certification Mark
The International Lubricant
Specification Advisory Com-
mittee (ILSAC) Certification
Mark is displayed on the front
of the container.
1
2

933
8 8-1. Specifications
Vehicle specifications
GS450h_300h_OM_OM30D53E_(EE)
Cooling system
Gasoline
engine
Power control unit
Left-hand
drive
vehiclesRight-hand
drive
vehicles
Capacity
GS300h8.4 L (8.9 qt.,
7.4 Imp.qt.)2.1 L (2.2 qt.,
1.8 Imp.qt.)2.3 L (2.4 qt.,
2.0 Imp.qt.)
GS450h9.4 L (9.9 qt.,
8.3 Imp.qt.)3.1 L (3.3 qt.,
2.7 Imp.qt.)2.9 L (3.1 qt.,
2.6 Imp.qt.)
Coolant typeUse either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based
non-silicate, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.
Ignition system
Spark plug
Make
GapDENSO FK20HBR8
0.8 mm (0.031 in.)
NOTICE
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.

941
8 8-1. Specifications
Vehicle specifications
GS450h_300h_OM_OM30D53E_(EE)
Fuel information
Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your vehicle has a fuel tank opening that
only accommodates the special nozzle on unleaded fuel pumps.
If your engine knocks
Consult any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
You may occasionally notice light knocking for a short time while acceler-
ating or driving uphill. This is normal and there is no need for concern.
GS300h
EU area:
Your vehicle must use only unleaded gasoline conforming to Euro-
pean standard EN228.
For optimum engine performance, select unleaded gasoline with a
Research Octane Number of 91 or higher.
Except EU area:
Your vehicle must use only unleaded gasoline.
For optimum engine performance, select unleaded gasoline with a
Research Octane Number of 91 or higher.
GS450h
EU area:
Your vehicle must use only unleaded gasoline conforming to Euro-
pean standard EN228.
For optimum engine performance, select unleaded gasoline with a
Research Octane Number of 95 or higher.
Except EU area:
Your vehicle must use only unleaded gasoline.
For optimum engine performance, select unleaded gasoline with a
Research Octane Number of 95 or higher.

9428-1. Specifications
GS450h_300h_OM_OM30D53E_(EE)
NOTICE
Notice on fuel quality
Do not use improper fuels. If improper fuels are used, the engine will be
damaged.
Do not use leaded gasoline.
Leaded gasoline will cause the three-way catalytic converter to lose its
effectiveness and the emission control system to function improperly.
EU area: Bioethanol fuel sold under names such as “E50” or “E85” and
fuel containing a large amount of ethanol should not be used. The use of
these fuels will damage the vehicle’s fuel system. In case of any doubt,
ask any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
Except EU area: Bioethanol fuel sold under names such as “E50” or
“E85” and fuel containing a large amount of ethanol should not be used.
Your vehicle can use gasoline mixed with 10% max ethanol. The use of
fuel with more than 10% ethanol content (E10) will damage the vehicle’s
fuel system. You must ensure that refueling is carried out only from a
source where fuel specification and quality can be guaranteed. In case of
any doubt, ask any authorized Lexus dealer or repairer, or another duly
qualified and equipped professional.

965Alphabetical index
GS450h_300h_OM_OM30D53E_(EE)
Child safety .................................58
12-volt battery
precautions .................752, 916
Airbag precautions..................47
Child restraint system .............59
How your child should
wear the seat belt ............39, 41
Installing child restraints ........71
Moon roof precautions .........221
Power window lock switch...215
Power window precautions...217
Rear door child-protectors ....184
Removed electronic key
battery precautions .............781
Seat belt comfort guide...........39
Seat belt precautions ...............43
Seat heater precautions .........703
Trunk precautions ................190
Child-protectors ........................184
Cleaning ............................720, 724
Aluminum wheels.................721
Exterior .................................720
Interior ..................................724
Seat belts...............................725Clock ........................................ 698
Coat hooks ................................ 715
Condenser ................................ 747
Console box .............................. 690
Console box light...................... 690
Coolant ..................................... 744
Capacity ............................... 933
Checking .............................. 744
Preparing and checking
before winter ..................... 434
Cooling system ......................... 744
Engine overheating .............. 917
Hybrid system overheating .. 917
Cruise control
Cruise control ...................... 298
Dynamic radar cruise control ....
302
Dynamic radar cruise control
with full-speed range ......... 319
Cup holders............................... 691
Curtain shield airbags ................ 45
Customizable features .............. 943