LEXUS RX 450HL (2019 year). Instruction

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9-1. Specifications

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Gasoline quality
In very few cases, driveability problems may be caused by the brand of gasoline you are

using. If driveability problems persist, try changing 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 called the World-Wide Fuel Charter (WWFC), which is expected

to be applied worldwide.

●

The WWFC improves air quality by lowering emissions in vehicle fleets, and improves

customer satisfaction through 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 list of marketers, please go to the official

website www.toptiergas.com.

Fuel information

You must only use unleaded gasoline.
Select premium unleaded gasoline with an octane rating of 91 (Research
Octane Number 96) or higher required 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.

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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. These fuels are typically acceptable for use, pro-

viding they meet other fuel requirements.
Lexus recommends these fuels, since the formulations 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 rating 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

(Methylcyclopentadienyl 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 instrument 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
containing more than
15% ethanol.

(30% ethanol)

(50% ethanol)

(85% ethanol)

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9-1. Specifications

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NOTICE

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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 number or rating lower than the level previ-

ously stated may cause persistent heavy knocking.

At worst, this may lead to engine damage 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.

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

Full-size tire



Compact spare tire

Tire information

Typical tire symbols

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9-1. Specifications

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Tire size

(

P. 726)

DOT and Tire Identification Number (TIN)

(

P. 725)

Location of treadwear indicators

(

P. 611)

Tire ply composition and materials

Plies are layers of rubber-coated 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. 615)

Maximum cold tire inflation pressure

(

P. 717)

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. 615)

An all season tire has “M+S” on the sidewall. 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.

2
3
4

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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 DOT and Tire Identification Number (TIN)



Type A



Type B

2
3
4
5
6
7
8

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9-1. Specifications

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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)

■

Tire dimensions

Section width
Tire height
Wheel diameter

Tire size

2
3

5
6
7

2
3

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Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer

Tire section names

2
3
4
5
6
7
8
9

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9-1. Specifications

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This information has been prepared in accordance with regulations issued by the
National Highway Traffic Safety Administration of the U.S. Department of Trans-
portation.
It provides the purchasers and/or prospective purchasers of Lexus vehicles with
information on uniform tire quality grading.

Your Lexus dealer will help answer any questions you may have as you read this infor-

mation.

■

DOT quality grades
All passenger vehicle tires must conform to Federal Safety Requirements in
addition to these grades. Quality grades can be found where applicable on
the tire sidewall between tread shoulder and maximum section width.

For example: Treadwear 200 Traction AA Temperature A

■

Treadwear
The treadwear grade is a comparative rating based on the wear rate of the tire
when tested under controlled conditions on a specified government test
course.

For example, a tire graded 150 would wear one and a half (1 - 1/2) times as well on

the government course as a tire graded 100.

The relative performance of tires depends upon the actual conditions of their use.

Performance may differ significantly from the norm due to variations in driving

habits, service practices and differences in road characteristics and climate.

■

Traction AA, A, B, C
The traction grades, from highest to lowest, are AA, A, B and C, and they rep-
resent the tire’s ability to stop on wet pavement as measured under controlled
conditions on specified government test surfaces of asphalt and concrete.

A tire marked C may have poor traction performance.
Warning: The traction grade assigned to this tire is based on braking (straight

ahead) traction tests and does not include cornering (turning) traction.

Uniform Tire Quality Grading

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Temperature A, B, C
The temperature grades are A (the highest), B, and C, representing the tire’s
resistance to the generation of heat and its ability to dissipate heat when
tested under controlled conditions on a specified indoor laboratory test
wheel.

Sustained high temperature can cause the material of the tire to degenerate and

reduce tire life, and excessive temperature can lead to sudden tire failure.
Grade C corresponds to a level of performance which all passenger car tires must

meet under the Federal Motor Vehicle Safety Standard No. 109.
Grades B and A represent higher levels of performance on the laboratory test

wheel than the minimum required by law.
Warning: The temperature grades of a tire assume that it is properly inflated and

not overloaded.

Excessive speed, underinflation, or excessive loading, either separately or in com-

bination, can cause heat buildup and possible tire failure.

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9-1. Specifications

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Glossary of tire terminology

Tire related term

Meaning

Cold tire inflation pressure

Tire pressure when the vehicle has been parked for

three hours or more, or has not been driven more than 1

mile or 1.5 km under that condition

Maximum inflation pres-

sure

The maximum cold inflated pressure to which a tire may

be inflated, shown on the sidewall of the tire

Recommended inflation

pressure

Cold tire inflation pressure recommended by a manu-

facturer

Accessory weight

The combined weight (in excess of those standard items

which may be replaced) of hybrid transmission, power

steering, power brakes, power windows, power seats,

radio and heater, to the extent that these items are avail-

able as factory-installed equipment (whether installed

or not)

Curb weight

The weight of a motor vehicle with standard equipment,

including the maximum capacity of fuel, oil and coolant,

and if so equipped, air conditioning and additional

weight optional engine

Maximum loaded vehicle

weight

The sum of:

(a) Curb weight

(b) Accessory weight

(d) Production options weight

Normal occupant weight

150 lb. (68 kg) times the number of occupants specified

in the second column of Table 1

that follows

Occupant distribution

Distribution of occupants in a vehicle as specified in the

third column of Table 1

below

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Production options weight

The combined weight of installed regular production

options weighing over 5 lb. (2.3 kg) in excess of the

standard items which they replace, not previously con-

sidered in curb weight or accessory weight, including

heavy duty brakes, ride levelers, roof rack, heavy duty

12-volt battery, and special trim

Rim

A metal support for a tire or a tire and tube assembly

upon which the tire beads are seated

Rim diameter

(Wheel diameter)

Nominal diameter of the bead seat

Rim size designation

Rim diameter and width

Rim type designation

The industry manufacturer’s designation for a rim by

style or code

Rim width

Nominal distance between rim flanges

Vehicle capacity weight

(Total load capacity)

The rated cargo and luggage load plus 150 lb. (68 kg)

times the vehicle’s designated seating capacity

Vehicle maximum load on

the tire

The load on an individual tire that is determined by dis-

tributing to each axle its share of the maximum loaded

vehicle weight, and dividing by two

Vehicle normal load on the

tire

The load on an individual tire that is determined by dis-

tributing to each axle its share of curb weight, accessory

weight, and normal occupant weight (distributed in

accordance with Table 1

below), and dividing by two

Weather side

The surface area of the rim not covered by the inflated

tire

Bead

The part of the tire that is made of steel wires, wrapped

or reinforced by ply cords and that is shaped to fit the

rim

Tire related term

Meaning

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9-1. Specifications

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Bead separation

A breakdown of the bond between components in the

bead

Bias ply tire

A pneumatic tire in which the ply cords that extend to

the beads are laid at alternate angles substantially less

than 90 degrees to the centerline of the tread

Carcass

The tire structure, except tread and sidewall rubber

which, when inflated, bears the load

Chunking

The breaking away of pieces of the tread or sidewall

Cord

The strands forming the plies in the tire

Cord separation

The parting of cords from adjacent rubber compounds

Cracking

Any parting within the tread, sidewall, or innerliner of

the tire extending to cord material

A pneumatic tire with an inverted flange tire and rim

system in which the rim is designed with rim flanges

pointed radially inward and the tire is designed to fit on

the underside of the rim in a manner that encloses the

rim flanges inside the air cavity of the tire

Extra load tire

A tire designed to operate at higher loads and at higher

inflation pressures than the corresponding standard tire

Groove

The space between two adjacent tread ribs

Innerliner

The layer(s) forming the inside surface of a tubeless tire

that contains the inflating medium within the tire

Innerliner separation

The parting of the innerliner from cord material in the

carcass

Tire related term

Meaning

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Intended outboard sidewall

(a)The sidewall that contains a whitewall, bears white

lettering, or bears manufacturer, brand, and/or

model name molding that is higher or deeper than

the same molding on the other sidewall of the tire, or

(b)The outward facing sidewall of an asymmetrical tire

that has a particular side that must always face out-

ward when mounted on a vehicle

Light truck (LT) tire

A tire designated by its manufacturer as primarily

intended for use on lightweight trucks or multipurpose

passenger vehicles

Load rating

The maximum load that a tire is rated to carry for a given

inflation pressure

Maximum load rating

The load rating for a tire at the maximum permissible

inflation pressure for that tire

Maximum permissible infla-

tion pressure

The maximum cold inflation pressure to which a tire may

be inflated

Measuring rim

The rim on which a tire is fitted for physical dimension

requirements

Open splice

Any parting at any junction of tread, sidewall, or inner-

liner that extends to cord material

Outer diameter

The overall diameter of an inflated new tire

Overall width

The linear distance between the exteriors of the side-

walls of an inflated tire, including elevations due to label-

ing, decorations, or protective bands or ribs

Passenger car tire

A tire intended for use on passenger cars, multipurpose

passenger vehicles, and trucks, that have a gross vehicle

weight rating (GVWR) of 10,000 lb. or less.

Ply

A layer of rubber-coated parallel cords

Ply separation

A parting of rubber compound between adjacent plies

Tire related term

Meaning

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Pneumatic tire

A mechanical device made of rubber, chemicals, fabric

and steel or other materials, that, when mounted on an

automotive wheel, provides the traction and contains

the gas or fluid that sustains the load

Radial ply tire

A pneumatic tire in which the ply cords that extend to

the beads are laid at substantially 90 degrees to the

centerline of the tread

Reinforced tire

A tire designed to operate at higher loads and at higher

inflation pressures than the corresponding standard tire

Section width

The linear distance between the exteriors of the side-

walls of an inflated tire, excluding elevations due to

labeling, decoration, or protective bands

Sidewall

That portion of a tire between the tread and bead

Sidewall separation

The parting of the rubber compound from the cord

material in the sidewall

Snow tire

A tire that attains a traction index equal to or greater

than 110, compared to the ASTM E-1136 Standard Ref-

erence Test Tire, when using the snow traction test as

described in ASTM F-1805-00, Standard Test Method

for Single Wheel Driving Traction in a Straight Line on

Snow-and Ice-Covered Surfaces, and which is marked
with an Alpine Symbol(

) on at least one sidewall

Test rim

The rim on which a tire is fitted for testing, and may be

any rim listed as appropriate for use with that tire

Tread

That portion of a tire that comes into contact with the

road

Tread rib

A tread section running circumferentially around a tire

Tire related term

Meaning

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: Table 1

 Occupant loading and distribution for vehicle normal load for various des-

ignated seating capacities

Tread separation

Pulling away of the tread from the tire carcass

Treadwear indicators (TWI)

The projections within the principal grooves designed

to give a visual indication of the degrees of wear of the

tread

Wheel-holding fixture

The fixture used to hold the wheel and tire assembly

securely during testing

Tire related term

Meaning

Designated seating capac-

ity, Number of occupants

Vehicle normal load, Num-

ber of occupants

Occupant distribution in a

normally loaded vehicle

2 through 4

2 in front

5 through 10

2 in front, 1 in second seat

11 through 15

2 in front, 1 in second seat, 1

in third seat, 1 in fourth seat

16 through 20

2 in front, 2 in second seat,

2 in third seat, 1 in fourth

seat

LEXUS RX 450HL (2019 year). Instruction - part 45