Lexus GS300 2018 Owner's Manuals

GS350_300_GS F_OM_OM30G34U_(U)
5298-1. Specifications
8
Vehicle specifications
GS350/GS300 (Type C)
GS350/GS300 (Type D)
GS350/GS300 (Type E)
Tire sizeP235/45R18 94V
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 99 mph
(160 km/h)45 (310, 3.1)45 (310, 3.1)
99 mph (160 km/h)
or less35 (240, 2.4)35 (240, 2.4)
Wheel size18 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size235/40R19 96Y XL (front), 265/35R19 94Y (rear)
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speedFront tire
psi (kPa, kgf/cm2
or bar)Rear tire
psi (kPa, kgf/cm2
or bar)
More than 137 mph
(220 km/h)45 (310, 3.1)45 (310, 3.1)
137 mph (220 km/h)
or less35 (240, 2.4)36 (250, 2.5)
Wheel size19 × 8J (235/40R19), 19 × 9J (265/35R19)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size235/40R19 96Y XL
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 137 mph
(220 km/h)45 (310, 3.1)45 (310, 3.1)
137 mph (220 km/h)
or less35 (240, 2.4)36 (250, 2.5)
Wheel size19 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

530
GS350_300_GS F_OM_OM30G34U_(U)8-1. Specifications
GS350/GS300 (Type F)
GS350/GS300 (Compact spare tire)
Tire size235/40R19 96V XL
Tire inflation
pressure
(Recommended
cold tire inflation
pressure)Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 99 mph
(160 km/h)45 (310, 3.1)45 (310, 3.1)
99 mph (160 km/h)
or less35 (240, 2.4)36 (250, 2.5)
Wheel size19 × 8J
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire sizeT155/70D17 110M, T145/70D18 107M
Tire inflation pressure
(Recommended cold tire
inflation pressure)60 psi (420kPa, 4.2kgf/cm2 or bar)
Wheel size17 × 4T (T155/70D17), 18 × 4T (T145/70D18)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

GS350_300_GS F_OM_OM30G34U_(U)
5318-1. Specifications
8
Vehicle specifications
GS F
*: If equipped
Tire size255/35ZR19 (92Y) (front), 275/35ZR19 (96Y) (rear),
225/40ZR19 (93Y) XL (spare)
*
Tire inflation pressure
(Recommended
cold tire inflation
pressure)
Vehicle speed
Front tire
psi (kPa, kgf/cm2
or bar)
Rear tire
psi (kPa, kgf/cm2
or bar)
More than 137 mph
(220 km/h)44 (300, 3.0)44 (300, 3.0)
137 mph (220 km/h)
or less36 (250, 2.5)36 (250, 2.5)
Tire inflation pressure
(spare)
(Recommended
cold tire inflation
pressure)
42 psi (290kPa, 2.9kgf/cm2 or bar)
Wheel size19 × 9J (255/35ZR19), 19 × 10J (275/35ZR19),
19 × 8 1/2J (225/40ZR19)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Light bulbs
Light bulbsBulb No.WType
ExteriorFront turn signal lights*7444NA28A
Outer foot lightsW5W5B
InteriorVanity lights⎯8B
Trunk light⎯3.8B
A: Wedge base bulbs (amber)
B: Wedge base bulbs (clear)
*: Vehicles with single-beam headlights

532
GS350_300_GS F_OM_OM30G34U_(U)8-1. Specifications
Fuel information
■Gasoline quality
In very few cases, driveabilit
y problems may be caused by th e brand of gasoline you are
using. If driveability problems persist, try ch anging the brand of gasoline. If this does not
correct the problem, consult your Lexus dealer.
■Gasoline quality standards
●Automotive manufacturers in the U.S.A., Europe and Japan have developed a specifi-
cation for fuel quality calle d the World-Wide Fuel Charte r (WWFC), which is expected
to be applied worldwide.
●The WWFC consists of four categories that are based on required emission levels. In
the U.S., category 4 has been adopted.
●The WWFC improves air quality by lowering emissions in vehicle fleets, and improves
customer satisfaction th rough better performance.
■Recommendation of the use of gasoline containing detergent additives
●Lexus recommends the use of gasoline that contains detergent additives to avoid the
build-up of engine deposits.
●All gasoline sold in the U.S.A. contains minimum detergent additives to clean and/or
keep clean intake systems, per EPA’s lowest additives concentration program.
●Lexus strongly recommends the use of Top Tier Detergent Gasoline. For more informa-
tion on Top Tier Detergent Gasoline and a lis t of marketers, please go to the official
website www.toptiergas.com.
You must only use unleaded gasoline.
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher requir ed for optimum engine performance
and fuel economy.
If the octane rating is less than 91, damage to the engine may occur and may
void the vehicle warranty.
At minimum, the gasoline you use should meet the specifications of ASTM
D4814 in the U.S.A..

GS350_300_GS F_OM_OM30G34U_(U)
5338-1. Specifications
8
Vehicle specifications
■Recommendation of the use of low emissions gasoline
Gasolines containing oxygenates such as ethers and ethanol, as well as reformulated
gasolines, are available in some cities. Thes e fuels are typically acceptable for use, pro-
viding they meet other fuel requirements.
Lexus recommends these fuels, since the form ulations allow for reduced vehicle emis-
sions.
■Non-recommendation of the use of blended gasoline
●If you use gasohol in your vehicle, be sure that it has an octane ra ting no lower than 91.
●Lexus does not recommend the use of gasoline containing methanol.
■Non-recommendation of the use of gasoline containing MMT
Some gasoline contains an octane enhancing additive called MMT (Methylcyclopenta-
dienyl Manganese Tricarbonyl).
Lexus does not recommend the use of gasoline that contains MMT. If fuel containing
MMT is used, your emission control system may be adversely affected.
The malfunction indicator lamp on the instru ment cluster may come on. If this happens,
contact your Lexus dealer for service.
■If your engine knocks
●Consult your Lexus dealer.
●You may occasionally notice light knocking for a short time while accelerating or driv-
ing uphill. This is normal and there is no need for concern.
●Use only gasoline containing up to 15% etha-
nol.
DO NOT use any flex-fuel or gasoline that
could contain more than 15% ethanol, includ-
ing from any pump labeled E30, E50, E85
(which are only some examples of fuel con-
taining more than 15% ethanol).DO NOT use gasoline con-
taining more than 15% ethanol.
(30% ethanol)
(50% ethanol)
(85% ethanol)

534
GS350_300_GS F_OM_OM30G34U_(U)8-1. Specifications
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 can cause damage to your
vehicle’s three-way catalytic converters
causing the emission control system to malfunction.
●Do not use gasohol other than the type previously stated.
Other gasohol may cause fuel system damage or vehicle performance problems.
●Using unleaded gasoline with an octane numb er or rating lower than the level previ-
ously stated may cause pe rsistent heavy knocking.
At worst, this may lead to engine da mage and will void the vehicle warranty.
■Fuel-related poor driveability
If poor driveability (poor hot starting, vaporization, engine knocking, etc.) is encoun-
tered after using a different type of fuel, discontinue the use of that type of fuel.
■When refueling with gasohol
Take care not to spill gasohol. It can damage your vehicle’s paint.

535
GS350_300_GS F_OM_OM30G34U_(U)8-1. Specifications
8
Vehicle specifications
Tire information
Full-size tire
Compact spare tire
Typical tire symbols

536
GS350_300_GS F_OM_OM30G34U_(U)8-1. Specifications
Tire size
(→ P. 537)
DOT and Tire Identification Number (TIN) (→ P. 537)
Location of trea dwear indicators (→ P. 393)
Tire ply composition and materials
Plies are layers of rubber-c oated parallel cords. Cords are the strands which form the
plies in a tire.
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply
tire.
TUBELESS or TUBE TYPE
A tubeless tire does not have a tube and air is directly put into the tire. A tube type tire
has a tube inside the tire and the tube maintains the air pressure.
Load limit at maximum cold tire inflation pressure (→ P. 540)
Maximum cold tire inflation pressure (→ P. 540)
This means the pressure to which a tire may be inflated.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
Summer tires or all season tires (→ P. 397)
An all season tire has “M+S” on the side wall. A tire not marked “M+S” is a summer
tire.
“TEMPORARY USE ONLY”
A compact spare tire is identified by the phrase “TEMPORARY USE ONLY” molded
on its sidewall. This tire is designed for temporary emergency use only.
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GS350_300_GS F_OM_OM30G34U_(U)
5378-1. Specifications
8
Vehicle specifications
DOT symbol*
Tire Identification Number (TIN)
Tire manufacturer’s identification mark
Tire size code
Manufacturer’s optional tire type code (3 or 4 letters)
Manufacturing week
Manufacturing year
Manufacturer’s code
*: The DOT symbol certifies that the tire conforms to applicable Federal Motor Vehicle
Safety Standards.
■Typical tire size information
The illustration indicates typical tire
size.
Tire use
(P = Passenger car,
T = Temporary use)
Section width (millimeters)
Aspect ratio
(tire height to section width)
Tire construction code (R = Radial, D = Diagonal)
Wheel diameter (inches)
Load index (2 digits or 3 digits)
Speed symbol (alphabet with one letter)
Typical DOT and Tire Identification Number (TIN)
Type AType B
Tire size
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538
GS350_300_GS F_OM_OM30G34U_(U)8-1. Specifications
■Tire dimensions
Section width
Tire height
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
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Tire section names
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