2012 Lexus GS250 recommended

8247-2. Steps to take in an emergency
GS350/250_EE (OM30C36E)
Stopping the engine
Shift the shift lever to P and press the engine switch as you normally do when
stopping the engine.
Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(P. 697)
Alarm (if equipped)
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set,
the alarm may be triggered.
Changing engine switch modes
Release the brake pedal and press the engine switch in step above.
The engine does not start and modes will be changed each time the switch is
pressed.(P. 208)
When the electronic key does not work properly
Make sure that the smart entry & start system has not been deactivated in
the customization setting. If it is off, turn the function on.
(Customizable features P. 855)
Check if battery-saving mode is set. If it is set, cancel the function. (P.
129)
3

8408-1. Specifications
GS350/250_EE (OM30C36E)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 5W-30 or
lower viscosity engine oil is
recommended.
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.
Temperature range anticipated
before next oil change.Preferred

8428-1. Specifications
GS350/250_EE (OM30C36E)
Except EU area, Nordic countries, Russia, Ukraine, Croatia,
Macedonia, Israel
“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:
5W-30 and 10W-30:
API grade SL “Energy-Conserving”, SM “Energy-Conserving”,
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):
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 5W-30
engine oil is recommended.
Oil viscosity (10W-30 is explained here as an example):
• The 10W in 10W-30 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 10W-30 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.
Temperature range anticipated
before next oil change.

845
8 8-1. Specifications
Vehicle specifications
GS350/250_EE (OM30C36E)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 5W-30 or
lower viscosity engine oil is
recommended.
Temperature range anticipated
before next oil change.Preferred

8508-1. Specifications
GS350/250_EE (OM30C36E)
Type A
*: 5 passengers and full loaded
Type B
Tires and wheels
Tire size225/50R17 94W
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)
Vehicle speed
Front wheel
kPa (kgf/cm2
or bar, psi)
Rear wheel
kPa (kgf/cm2
or bar, psi)
More than 210 km/
h
(132 mph)270 (2.7, 39)*
250 (2.5, 36)
290 (2.9, 42)*
250 (2.5, 36)
From 160 km/h
(100
mph) to 210 km/h
(132 mph)
230 (2.3, 33)
240 (2.4, 35)*
230 (2.3, 33)
160 km/h
(100 mph)
or less
230 (2.3, 33)
Wheel size17  7 1/2J
Wheel nut torque103 N•m (10.5 kgf•m, 76 ft•lbf)
Tire size235/45R18 94Y
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)
Vehicle speed
Front wheel
kPa (kgf/cm2
or bar, psi)
Rear wheel
kPa (kgf/cm2
or bar, psi)
More than 210 km/
h
(132 mph)
230 (2.3, 33)
250 (2.5, 36)*
230 (2.3, 33)
From 160 km/h
(100
mph) to 210 km/h
(132 mph)
230 (2.3, 33)
160 km/h (100
mph)
or less

8528-1. Specifications
GS350/250_EE (OM30C36E)
Type C
*: 5 passengers and full loaded
Compact spare tire
When towing a trailer
Add 20.0 kPa (0.2 kgf/cm
2 or bar, 3 psi) to the recommended tire inflation
pressure and drive at speeds below 100 km/h (62 mph).
Tire size235/40R19 96Y XL, 265/35R19 94Y
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)
Vehicle speed
Front wheel
kPa (kgf/cm2
or bar, psi)
Rear wheel
kPa (kgf/cm2
or bar, psi)
More than 210 km/
h
(132 mph)250 (2.5, 36)*
240 (2.4, 35)
250 (2.5, 36)
From 160 km/h
(100
mph) to 210 km/h
(132 mph)
240 (2.4, 35)
160 km/h (100
mph)
or less
Wheel size19  8J (235/40R19), 19  9J (265/35R19)
Wheel nut torque103 N•m (10.5 kgf•m, 76 ft•lbf)
Tire sizeT155/70D17 110M, T145/70D18 107M
Tire inflation pressure
(Recommended cold
tire
inflation pressure)
420 kPa (4.2 kgf/cm2 or bar, 60 psi)
Wheel size17  4T (T155/70D17), 18  4T (T145/70D18)
Wheel nut torque103 N•m (10.5 kgf•m, 76 ft•lbf)