
6779-1. Specifications
9
Vehicle specifications
RX350_U_OM48E90U ■
Engine oil selection
“Toyota Genuine Motor Oil” is used in your Lexus vehicle. Use Lexus
approved “Toyota Genuine Motor Oil” or equivalent to satisfy the following
grade and viscosity.
Oil grade: ILSAC GF-5 multigrade engine oil
Recommended viscosity: SAE 0W-20
SAE 0W-20 is the best choice for
good fuel economy and good start-
ing in cold weather.
If SAE 0W-20 is not available, SAE
5W-20 oil may be used. However, it
must be replaced with SAE 0W-20
at the next oil change.
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 viscos ity 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 conditions.
How to read oil container label:
The International Lubricant Specifi-
cation Advisory Committee
(ILSAC) Certification Mark is added
to some oil containers to help you
select the oil you should use. Outside temperature

6839-1. Specifications
9
Vehicle specifications
RX350_U_OM48E90U ■
Gasoline quality
In very few cases, driveability problems may be caused by the 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., Eu rope and Japan have developed a specifi-
cation for fuel quality called the World-Wi de Fuel Charter (WWFC), which is expected
to be applied worldwide. ●
The WWFC consists of four cat egories 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 through better performance. ■
Recommendation of the use of gasoli ne 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 Ti er 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 octane rating 87 (Research Octane Number 91) or higher. Use of
unleaded gasoline with an octane rating lower than 87 may result in engine
knocking. Persistent knocking can lead to engine damage.
At minimum, the gasoline you use should meet the specifications of ASTM
D4814 in the U.S.A.

684 9-1. Specifications
RX350_U_OM48E90U ■
Recommendation of the use of low emissions gasoline
Gasolines containing oxygenates such as et hers 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 fo rmulations allow for reduced vehicle emis-
sions. ■
Non-recommendation of the use of blended gasoline
●
If you use gasohol in your vehicle, be sure th at it has an octane rating no lower than 87.●
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 gasolin e 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 fo r 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)

6859-1. Specifications
9
Vehicle specifications
RX350_U_OM48E90U 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 da mage or vehicle performance problems.●
Using unleaded gasoline with an octane number or rating lower than the level previ-
ously stated will cause persistent heavy knocking.
At worst, this will le ad to engine damage.■
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.

6939-1. Specifications
9
Vehicle specifications
RX350_U_OM48E90U 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 un der 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 automatic transmission,
power steering, power brakes, power windows, power
seats, radio and heater, to the extent that these items are
available 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 co nditioning and additional
weight optional engine
Maximum loaded vehicle
weight The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight 150 lb. (68 kg) times the numb er of occupa nts 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

737Alphabetical index
RX350_U_OM48E90U Flat tire ...................................................... 646
Floor mats ................................................... 26
Fluid
Automatic transmission ..................679
Brake ....................................................... 680
Washer .................................................. 583
Fog lights
Replacing light bulbs ......................... 610
Switch....................................................... 249
Front passenger footwell hooks ..... 533
Front passenger occupant
classification system ............................ 49
Front passenger’s seat belt
reminder light ..................................... 636
Front seat heaters................................. 506
Front seats .................................................152
Adjustment ............................................. 152
Cleaning .................................................. 561
Correct driving posture .................... 28
Driving position memory ................ 162
Head restraints ......................................167
Power easy access system ............ 162
Seat heaters ......................................... 506
Seat position memory....................... 162
Front side marker lights
Light switch .............................................241
Replacing light bulbs ......................... 610
Wattage ................................................. 682 Front turn signal lights
Replacing light bulbs ........................ 610
Turn signal lever ................................. 234
Wattage ................................................. 682
Fuel
Capacity ................................................. 676
Fuel gauge ............................................... 85
Information............................................683
Refueling ................................................258
Type.......................................................... 676
Fuel filler door........................................ 258
Refueling ................................................258
When the fuel filler door
cannot be opened ......................... 260
Fuses.......................................................... 605
Garage door opener.......................... 536
Gauges........................................................ 85
Glove box ................................................. 513
Grocery bag hooks............................... 519F
G

742 Alphabetical index
RX350_U_OM48E90U Rear side marker lights
Light switch .............................................241
Replacing light bulbs ......................... 610
Rear turn signal lights
Replacing light bulbs ......................... 610
Turn signal lever ................................. 234
Wattage ................................................. 682
Rear view mirror
Inside rear view mirror ....................... 171
Outside rear view mirrors ...............173
Rear window defogger ......................500
Rear window wiper.............................. 256
Refueling .................................................. 258
Capacity .................................................676
Fuel types ...............................................676
Opening the fuel tank cap............ 258
When the fuel filler door
cannot be opened ........................ 260
Remote Touch
* ....................................488
Replacing
Electronic key battery ..................... 603
Fuses........................................................ 605
Light bulbs .............................................. 610
Tires ......................................................... 646
Windshield wiper inserts ................ 601
Reporting safety defects for
U.S. owners............................................ 714
Resetting the message indicating
maintenance is required ................ 565
Rev indicator ............................................. 87
Rev peak ..................................................... 87 S-FLOW mode......................................496
Seat belts .................................................... 30
Automatic Locking Retractor .........32
Child restraint system
installation ............................................. 57
Cleaning and maintaining the
seat belt ............................................... 562
Emergency Locking Retractor .......32
How to wear your seat belt............. 30
How your child should
wear the seat belt ...............................32
Pregnant women, proper seat
belt use ................................................... 33
Reminder light and buzzer ........... 636
Seat belt extender .................................32
Seat belt instructions for
Canadian owners ............................ 715
Seat belt pretensioners ........................ 31
SRS warning light .............................. 634
Seat position memory .......................... 162
Seat ventilators...................................... 507
Seating capacity ................................... 204 S

747Alphabetical index
RX350_U_OM48E90U Warning buzzers
Approach warning ................. 309, 321
Downshifting ........................................ 232
Intuitive parking assist ......................334
Lane departure alert
function ................................... 284, 293
Light reminder ..................................... 243
Open door ............................................. 128
Pre-collision warning ......................... 271
Seat belt reminder ............................ 636
Vehicle sway warning ........ 285, 294
Warning lights
ABS ...........................................................634
Brake hold operated indicator... 635
Brake system........................................634
Charging system................................634
Electric power steering.................. 635
LDA indicator ..................................... 635
LKA indicator...................................... 635
Low fuel level ...................................... 636
Malfunction indicator lamp ...........634
Master warning light........................ 636
Parking brake indicator ................. 635
PCS warning light ............................ 636
Seat belt reminder light.................. 636
Slip indicator ........................................ 635
SRS ............................................................634
Tire pressure ....................................... 636
Warning messages ................................641
Washer
Checking............................................... 583
Preparing and checking
before winter ................................... 380
Switch.......................................... 250, 256
Washing and waxing........................... 556 Weights
Cargo capacity.......................200, 674
Load limits ................................. 204, 674
Weights .................................................. 674
Wheels ..................................................... 596
Replacing wheels ..............................596
Size .......................................................... 680
Window glasses...................................... 177
Window lock switch.............................. 177
Windows
Power windows.................................... 177
Rear window defogger ................... 501
Washer ...................................... 250, 256
Windshield wiper de-icer ................. 500
Windshield wiper inserts ....................601
Windshield wipers ............................... 250
Intermittent windshield wipers ....250
Rain-sensing windshield
wipers..................................................... 251
Replacing a windshield wiper
insert ...................................................... 601
Winter driving tips ............................... 380
Wireless charger...................................524
Wireless communication .......438, 448
Wireless remote control ..................... 120
Battery-saving function .................... 147
Locking/Unlocking ............................120
Panic mode ..............................................121
Replacing the battery ......................603
WMA disc................................................422
XM ®
Satellite Radio ............................ 416W
X