2018 Lexus IS350 Owner's Manual / LEXUS 2018 IS300,IS350 OWNER'S MANUAL (OM53E34U)

5939-1. Specifications
9
Vehicle specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Type A
Type B
Tires and wheels
Tire size225/45R17 91W, T125/70D17 98M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
36 psi (250 kPa, 2.5 kgf/cm2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Spare: 60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Driving at high speeds (above 118 mph [190 km/h]) (in
countries where such speeds are permitted by law)
Add 5 psi (30 kPa, 0.3 kgf/cm
2 or bar) to the front
tires and rear tires. Never exceed the maximum cold
tire inflation pressure indi cated on the tire sidewall.
Wheel size17 × 7 1/2J, 17 × 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size225/45R17 91V, T125/70D17 98M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
36 psi (250 kPa, 2.5 kgf/cm2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Spare: 60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Driving at high speeds (above 100 mph [160 km/h]) (in
countries where such speeds are permitted by law)
Add 5 psi (30 kPa, 0.3 kgf/cm
2 or bar) to the front
tires and rear tires. Never exceed the maximum cold
tire inflation pressure indi cated on the tire sidewall.
Wheel size17 × 7 1/2J, 17 × 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

5949-1. Specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Type C
Type D
Tire size225/40R18 88Y, 255/35R18 90Y,
T125/70D17 98M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
36 psi (250 kPa, 2.5 kgf/cm2 or bar)
Rear:
36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Spare: 60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Driving at high speeds (above 137 mph [220 km/h]) (in
countries where such speeds are permitted by law)
Add 2 psi (10 kPa, 0.1 kgf/cm
2 or bar) to the front tires
and rear tires. Never exce ed the maximum cold tire
inflation pressure indicated on the tire sidewall.
Wheel size18 × 8J (225/40R18), 18 × 8 1/2J (255/35R18),
17 × 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)
Tire size225/40R18 88W, 255/35R18 90W,
T125/70D17 98M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Front:
36 psi (250 kPa, 2.5 kgf/cm2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Spare: 60 psi (420 kPa, 4.2 kgf/cm
2 or bar)
Driving at high speeds (above 118 mph [190 km/h]) (in
countries where such speeds are permitted by law)
Add 6 psi (40 kPa, 0.4 kgf/cm
2 or bar) to the front
tires and rear tires. Never exceed the maximum cold
tire inflation pressure indi cated on the tire sidewall.
Wheel size18 × 8J (225/40R18), 18 × 8 1/2J (255/35R18),
17 × 4T (spare)
Wheel nut torque76 ft•lbf (103 N•m, 10.5 kgf•m)

5959-1. Specifications
9
Vehicle specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Light bulbs*
Light bulbsBulb No.WType
Exterior
Front turn signal lights 7444NA28/8A
Rear turn signal lights⎯21A
Outer foot lights⎯5B
Interior
Door courtesy lights1685B
Vanity lights⎯8B
Interior light⎯8B
Personal lights⎯8B
Footwell lights1943.8B
Trunk light⎯5B
A: Wedge base bulbs (amber)
B: Wedge base bulbs (clear)
*: Light bulbs not listed in this table are LED bulbs.

5969-1. Specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■Gasoline quality
In very few cases, driveability 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.
Fuel information
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..

5979-1. Specifications
9
Vehicle specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
■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.
■Recommendation of the use of low emission gasoline
Gasolines containing oxygenates such as et hers 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)

5989-1. Specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
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.

5999-1. Specifications
9
Vehicle specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Full-size tire
Compact spare tire
Tire information
Typical tire symbols

6009-1. Specifications
IS350 AWD/IS350/IS300 AWD/IS300_U(OM53E34U)
Tire size (→ P. 602)
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.
Radial tires or bias-ply tires
A radial tire has “RADIAL” on the sidewall. A tire not marked “RADIAL” is a bias-ply
tire.
Summer tires or all season tires (→ P. 487)
An all season tire has “M+S” on the side wall. A tire not marked “M+S” is a summer
tire.
Maximum cold tire inflation pressure (→ P. 606)
This means the pressure to which a tire may be inflated.
Load limit at maximum cold tire inflation pressure (→ P. 606)
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.
Uniform tire quality grading
For details, see “Uniform Tire Quality Grading” that follows.
DOT and Tire Identification Number (TIN) (→ P. 601)
Location of trea dwear indicators (→ P. 483)
“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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