2007 Lexus GS350 fuel

5
When trouble arises
453
5-2. Steps to take in an emergency
■If the malfunction indicator lamp comes on while driving
First check the following:
●Is your vehicle low on gas?
If it is, refuel the vehicle immediately.
●Is the fuel tank cap loose? 
If it is, tighten it securely.
The light will go off after taking several driving trips. 
If the light does not go off even after several trips, contact your Lexus dealer as soon
a
s possible.
■SRS warning light
This warning light system monitors the following:
●The airbag sensor assembly
●Front airbag sensors
●The curtain shield airbag sensors
●The side and curtain shield airbag sensor assemblies
●The driver’s seat position sensor
●Driver’s seat belt buckle switch
●The front passenger occupant classification ECU
●The pressure sensor
●The belt tension sensor
●AIRBAG ON and AIRBAG OFF indicator lights
●Front passenger’s seat belt buckle switch
●The inflators
●The warning light
●The interconnecting wiring and power sources
■Front passenger detection sensor and passenger seat belt reminder
If luggage is placed on the front passenger seat, the front passenger detection sen -
sor may cause the warning light to flash, even if a passenger is not sitting in the seat.

5
When trouble arises
467
5-2. Steps to take in an emergency
CAUTION
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold
and inflated to the inflation pressure re commended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire and load information label).
(If your vehicle has tires of a different size than the size indicated on the vehicle
placard or tire inflation pressure label [tire and load information label], you should
determine the proper tire inflation pressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire pressure
monitoring system (TPMS-tire pressure warning system) that illuminates a low tire
pressure telltale (tire pressure warning light) when one or more of your tires is sig-
nificantly under-inflated. Accordingly, when the low tire pressure telltale (tire pres-
sure warning light) illuminates, you should stop and check your tires as soon as
possible, and inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat an d can lead to tire failure. Under-inflation
also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling
and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a substitute for
proper tire maintenance, and it is the driver's responsibility to maintain correct tire
pressure, even if under-inflation has not reached the level to trigger illumination of
the TPMS low tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system)
malfunction indicator to indicate when th e system is not operating properly. The
TPMS (tire pressure warning system) malf unction indicator is combined with the
low tire pressure telltale (tire pressure warning light). When the system detects a
malfunction, the telltale will flash for approximately one minute and then remain
continuously illuminated. This sequence will continue upon subsequent vehicle
start-ups as long as the malfunction exists . When the malfunction indicator is illumi-
nated, the system may not be able to detect or signal low tire pressure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a variety of rea-
sons, including the installation of replacem ent or alternate tires or wheels on the
vehicle that prevent the TPMS (tire pressure warning system) from functioning
properly. Always check the TPMS (tire pressure warning system) malfunction tell-
tale after replacing one or more tires or wheels on your vehicle to ensure that the
replacement or alternate tires and wheels allow the TPMS (tire pressure warning
system) to continue to function properly.

474
5-2. Steps to take in an emergency
■The compact spare tire
●The compact spare tire is identified by the label “TEMPORARY USE ONLY”
on the tire sidewall.
Use the compact spare tire temporarily only in an emergency.
●Make sure to check the tire inflatio n pressure of the compact spare tire. 
(  P. 505)
■Tr e a d l i f e
The compact spare tire can be used many times, if necessary. It has tread life of up
to 3000 miles (4

800 km) depending on road conditions and your driving habits.
When treadwear indicato rs appear on the tire, replace the tire. ( P. 3 9 1 )
■When using the compact spare tire
As the spare tire is not equipped with th e
tire pressure warning valve and transmit-
ter, low inflation pressure of the spare tire will not be warned. Also, if you replace the
comp
act spare tire after the tire pressure warning light comes on, the light remains
on.
■ Compact spare tire
The compact tire saves space in your luggage compartment, and its
lighter weight helps to enhance fuel economy and permits easier
installation in case of a flat tire.
The compact spare tire is
designed for tempor
ary emer-
gency use only.

5
When trouble arises
483
5-2. Steps to take in an emergency
If the engine will not start
If the engine will not start even though correct starting procedures are
being followed (
P. 9 7), consider each of the following points.
■The engine will not start even wh en the starter motor operates
normally.
One of the following may be the cause of the problem.
● Ther
e may not be sufficient fuel in the vehicle’s tank. 
Add fuel to the vehicle.
● The engine may be flooded. 
Try to restart the engine once mor
e following correct starting
procedures.( P. 9 7 )
● Ther
e may be a malfunction in the engine immobilizer system.
( P. 5 2 )
■ The star
ter motor turns over slow ly, the interior lights and head-
lights are dim, or the horn does not sound or sounds at a lo
w vol-
ume
One of the following may be the cause of the problem.
● The batter
y may be discharged. (P. 4 9 2 )
● The batter
y terminal connections may be loose or corroded.
■ The star
ter motor does not turn over, the interior lights and head-
lights do not turn on, or the horn does not sound
One of the following may be the cause of the problem.
● One or both of the batter
y terminals may be disconnected.
● The batter
y may be discharged. (P. 4 9 2 )

Vehicle specifications6
497
6-1. Specifications ......................... 498Maintenance data..................... 498
Fuel information........................ 508
Tire information ............................. 511
6-2. Customization ........................ 523 Customizable features ........... 523
6-3. Initialization ............................. 527 Items to initialize ........................ 527

500
6-1. Specifications
Engine
Fuel
GS430GS350
Model3UZ-FE2GR-FSE
Ty p e8-cylinder V type, 4-
cycle, gasoline6-cylinder V type, 4-
cycle, gasoline
Bore and stroke3.58  3.25 in. 
(91.0  82.5 mm)3.70  3.27 in. 
(94.0  83.0 mm)
Displacement262.0 cu.in. (4293 cm3)210.9 cu.in. (3456 cm3)
Drive belt tensionAutomatic adjustment
Fuel typePremium unleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity18.7 gal. (71 L, 15.6 lmp.gal)

501
6-1. Specifications
6
Vehicle specifications
Lubrication system
*: 5W-30 is an oil that provides optimal levels of fuel efficiency.
Oil viscosity:
● The 5W por
tion of the oil viscosity rating 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 30 in 5W-30 indicates the oil viscosity when the oil is as its operating
temperature. An oil with a higher viscosity may be better suited if the
vehicle is operated at high speeds, or under extreme load condition.
GS430GS350 (2WD)GS350 (4 WD)
Oil capacity 
(drain and refill)
with filter
without filter5.4 qt. (5.1 L, 4.5
lmp.qt.)
4.8 qt. (4.5 L,
4.0 lmp.qt.)6.6 qt. (6.3 L, 5.5
lmp.qt.)
6.2 qt. (5.9 L, 5.2
lmp.qt.)6.7 qt. (6.4 L, 5.6
lmp.qt.)
6.3 qt. (6.0 L,
5.3 lmp.qt.)
Oil gradeILSAC multigrade engine oil
Recommended oil 
viscosity
Use Lexus approved “Toyota Genuine Motor Oil” or
equivalent to satisfy the above grade and viscosity.
Outside temperature

508
6-1. Specifications
Fuel information
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your Lexus has a fuel tank opening that only
ac
commodates the special nozzle on unleaded fuel pumps.
■If premium gasoline is not available
If 91 Octane cannot be obtained, you ma y use unleaded gasolin
e with an Octane
Rating as low as 87 (Research Octane Number 91). 
However, use of unleaded fuel with an Octane Rating lower than 91 may result in
engine knocking (G
S350 only: or drasticall y reduce output to protect itself while
driving with heavy load). Persistent kn ocking can lead to engine damage and
should be corrected by refueling with higher octane unleaded gasoline.
■If your engine knocks
●Consult your Lexus dealer.
●You may occasionally notice light knocking for a short time while accelerating
or driving uphill. This is normal and there is no need for concern.
■Gasoline quality
In very few cases, driveability problems may be caused by the brand of gasoline you
ar
e using. If driveability problems persist, try changing the brand of gasoline. If this
does not correct the problem, consult your Lexus dealer.
Your vehicle must use only unleaded gasoline.
Premium unleaded gasoline with an Octane Rating 91 (Research Octane
Number 9
6) or higher required for optimum engine performance.
At minimum, the gasoline you use should meet the specifications of
ASTM D4814 in the U.S.A. an d CGSB3.5-M93 in Canada.