engine Lexus GS350 2020 Owner's Manual

5117-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
If the fans are not operating:
Stop the engine immediately an d contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the nearest Lexus dealer.
■When adding engine coolant (GS350)
Add coolant in accordance with the following procedure.
Remove caps A and B.
Add engine coolant through the inlet of cap A up to the “[AR/GR] B” line, and then
install cap A.
Add engine coolant through the inlet of cap B until it is full, and then install cap B.
Cap A
Cap B
“[AR/GR] B” line (Target fill line)
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GS350
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5127-2. Steps to take in an emergency
GS350_GS F_OM_OM30J07U_(U)
WARNING
■When inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.
●If steam is seen coming from under the h ood, do not open the hood until the steam
has subsided. The engine compartment may be very hot.
●Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fans and
belts. Failure to do so may cause the hands or clothing to be caught, resulting in seri-
ous injury.
NOTICE
■When adding engine coolant
Add coolant slowly after the engine has cooled down sufficiently. Adding cool coolant
to a hot engine too quickly can cause damage to the engine.
■To prevent damage to the cooling system
Observe the following precautions:
●Avoid contaminating the coolant with foreig n matter (such as sand or dust etc.).
●Do not use any coolant additive.
●GS350: Do not loosen the coolant inlet capor the engine coolant reservoir cap while the
engine and radiator are hot.
High temperature steam or coolant could
spray out.
●GS F: Do not loosen the engine coolant res-
ervoir cap while the engine and radiator are
hot.
High temperature steam or coolant could
spray out.

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GS350_GS F_OM_OM30J07U_(U)
7
When trouble arises
7-2. Steps to take in an emergency
If the vehicle becomes stuck
Stop the engine. Set the parking brake and shift the shift lever to P.
Remove the mud, snow or sand from around the rear wheels.
Place wood, stones or some other materi al under the rear wheels to help pro-
vide traction.
Restart the engine.
Shift the shift lever to D or R and rele ase the parking brake. Then, while exer-
cising caution, depress the accelerator pedal.
■When it is difficult to free the vehicle
Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Press to turn off TRAC. ( P. 299)GS350
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GS350_GS F_OM_OM30J07U_(U)
5178-1. Specifications
8
Vehicle specifications
■Vehicle identification number
The vehicle identification number (VIN) is the legal identifier for your vehicle.
This is the primary identification number fo r your Lexus. It is used in register-
ing the ownership of your vehicle.
This number is stamped on the top
left of the instrument panel and in the
engine compartment.
This number is also on the Certifica-
tion Label.
Vehicle identification
GS350GS F

518
GS350_GS F_OM_OM30J07U_(U)8-1. Specifications
■Engine number
The engine number is stamped on the engine block as shown.
GS350
GS F
GS350GS F
Engine
Model3.5 L 6-cylinder (2GR-FKS)
Type6-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70
 3.27 in. (94.0  83.0 mm)
Displacement210.9 cu.in. (3456 cm3)
Valve clearanceAutomatic adjustmentDrive belt tension
Model5.0 L 8-cylinder (2UR-GSE)
Type8-cylinder V type, 4-cycle, gasoline
Bore and stroke3.70  3.52 in. (94.0  89.5 mm)
Displacement303.2 cu. in. (4969 cm3)
Valve clearance
(engine cold)Intake: 0.006 in. (0.15 mm)
Exhaust: 0.009 in. (0.22 mm)
Drive belt tensionAutomatic adjustment

GS350_GS F_OM_OM30J07U_(U)
5198-1. Specifications
8
Vehicle specifications
GS350
*: The engine oil capacity is a reference quantity to be used when changing the engineoil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level
on the dipstick.
■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: ILSAC GF-5 multigrade engine oil
Fuel
Fuel typeUnleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)17.5 gal. (66.3 L, 14.6 Imp.gal.)
Lubrication system
GS350
2WDAWD
Oil capacity
(Drain and refill  reference
*)
With filter
Without filter
6.0 qt.
(5.7 L, 5.0 Imp.qt.)
5.8 qt.
(5.5 L, 4.8 Imp.qt.)6.8 qt.
(6.4 L, 5.6 Imp.qt.)
6.3 qt.
(6.0 L, 5.3 Imp.qt.)

520
GS350_GS F_OM_OM30J07U_(U)8-1. Specifications
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 0W-20 is not available, SAE
5W-20 oil may be used. However, it
must be replaced with SAE 0W-20
at the next oil change.
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 be fore the W allow for easier starting of
the engine in cold weather.
• The 20 in 0W-20 indicates the viscos ity 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 lo ad conditions.
How to read oil container label:
The International Lubricant Specifi-
cation Advisory Committee
(ILSAC) Certification Mark is added
to some oil containers to help you
select the oil you should use.
GS F
*: The engine oil capacity is a reference quantity to be used when changing the engine oil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level
on the dipstick.
Outside temperature
Oil capacity
(Drain and refill — reference*)
With filter
Without filter9.3 qt. (8.8 L, 7.7 Imp.qt.)
8.3 qt. (7.9 L, 7.0 Imp.qt.)

GS350_GS F_OM_OM30J07U_(U)
5218-1. Specifications
8
Vehicle specifications
■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: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 5W-30
SAE 5W-30 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 5W-30 is not available, SAE
10W-30 oil may be used. However,
it should be replaced with SAE 5W-
30 at the next oil change.
Oil viscosity (5W-30 is explained here as an example): • The 5W in 5W-30 indicates the charact eristic of the oil which allows cold
startability. Oils with a lower value be fore the W allow for easier starting of
the engine in cold weather.
• The 30 in 5W-30 indicates the viscos ity 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 lo ad conditions.
How to read oil container label:
The International Lubricant Specifi-
cation Advisory Committee
(ILSAC) Certification Mark is added
to some oil containers to help you
select the oil you should use.
Outside temperature

GS350_GS F_OM_OM30J07U_(U)
5238-1. Specifications
8
Vehicle specifications
*: The fluid capacity is the quantity of reference.If replacement is necessary, contact your Lexus dealer.
Electrical system
Battery
Open voltage at 68 F (20 C):12.3 V or higher
(Voltage is checked 20 minutes after the engine
and all lights are turned off.)
Charging rates5 A
Automatic transmission
Fluid capacity*
GS350 (2WD)10.0 qt. (9.5 L, 8.4 Imp.qt.)
GS350 (AWD)10.6 qt. (10.0 L, 8.8 Imp.qt.)
GS F11.8 qt. (11.2 L, 9.9 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Automatic transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may cause deterioration
in shift quality, locking up of your transm ission accompanied by vibration, and ulti-
mately damage the transmission of your vehicle.
Front differential (AWD models)
Oil capacity0.74 qt. (0.70 L, 0.62 Imp.qt.)
Oil type and viscosityToyota Genuine Differential gear oil GL-5 or equivalent
Above 0 F (-18 C): SAE90
Below 0 F (-18 C): SAE80W or SAE80W-90

524
GS350_GS F_OM_OM30J07U_(U)8-1. Specifications
GS350
GS F
*1: Your Lexus vehicle is filled with “Toyota Genuine Differential Gear Oil” at the factory.
Use Lexus approved “Toyota Genuine Differen tial Gear Oil” or an equivalent oil of
matching quality to satisfy the above specification. Please contact your Lexus dealer
for further details.
*2: Torque transfer modules are located on the ri ght and left sides of the rear differential
unit.
*3: Using torque transfer module fluid other than “Toyota Genuine ATF WS” may cause deterioration of performance, vibration, or ultimately damage the TVD system of your
vehicle.
*: Minimum pedal clearance when depressed wi th a force of 112.4 lbf (500 N, 51.0 kgf)
while the engine is running.
Rear differential
Oil capacity1.43 qt. (1.35 L, 1.19 Imp.qt.)
Oil type and viscosity
Vehicles without LSD (Limited Slip Differential):
Toyota Genuine Differential gear oil LT
75W-85 GL-5 or equivalent
*1
Vehicles with LSD (Limited Slip Differential):
Toyota Genuine Differential gear oil LX 75W-85 GL-5
or equivalent
*1
DifferentialTorque transfer module*2
Oil capacity 1.43 qt. (1.35 L, 1.19 Imp. qt.)
Left-hand side:
0.74 qt. (0.70 L, 0.62 Imp. qt.)
Right-hand side:
0.74 qt. (0.70 L, 0.62 Imp. qt.)
Oil type and
viscosity Toyota Genuine Differential gear
oil LT
75W-85 GL-5 or equivalent
*1Toyota Genuine ATF WS*3
Brakes
Pedal clearance*GS3504.0 in. (102 mm) Min.
GS F4.4 in. (112 mm) Min.
Pedal free play0.04 — 0.24 in. (1.0 — 6.0 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Parking brake lining wear limit0.04 in. (1.0 mm)
Fluid typeSAE J1703 or FMVSS No. 116 DOT 3