engine LEXUS RX350 2019 Owners Manual

694 8-2. Steps to take in an emergency
RX350/RX350L_U WARNING ■
To prevent an accident or injury when inspecting under the hood of your vehicle
Observe the following precautions.
Failure to do so may result in serious injury such as burns.●
If steam is seen coming from under the h ood, do not open the hood until the steam
has subsided. The engine compartment may be very hot. ●
Keep hands and clothing (especially a tie, a scarf or a muffler) away from the fans and
belts. Failure to do so may cause the hands or clothing to be caught, resulting in seri-
ous injury. ●
Do not loosen the radiator cap and the c oolant reservoir cap while the engine and
radiator are hot.
High temperature steam or coolant could spray out.
NOTICE ■
When adding engine coolant
Add coolant slowly after the engine has cool ed down sufficiently. Adding cool coolant
to a hot engine too quickly can cause damage to the engine. ■
To prevent damage to the cooling system
Observe the following precautions: ●
Avoid contaminating the coolant with foreig n matter (such as sand or dust etc.).●
Do not use any coolant additive.

6958-2. Steps to take in an emergency
8
When trouble arises
RX350/RX350L_U Stop the engine. Shift the shift lever to P and set the parking brake.
Remove the mud, snow or sand from around the front wheels.
Place wood, stones or some other materi al under the front wheels to help pro-
vide traction.
Restart the engine.
AWD models: Activate all-wheel drive lock mode. (  P. 377)
Shift the shift lever to D or R and rele ase the parking brake. Then, while exer-
cising caution, depress the accelerator pedal. ■
When it is difficult to free the vehicle
If the vehicle becomes stuck Carry out the following procedures if the tires spin or the vehicle becomes
stuck in mud, dirt or snow:
Press to turn off TRAC. 1
2
3
4
5
6

700 9-1. Specifications
RX350/RX350L_U ■
Engine number
The engine number is stamped on
the engine block as shown.
* : The engine oil capacity is a reference quantity to be used when changing the engine
oil. Warm up and turn off the engine, wait more than 5 minutes, and check the oil level
on the dipstick.Engine Model 3.5 L 6-cylinder (2GR-FKS)
Type 6-cylinder V type, 4-cycle, gasoline
Bore and stroke 3.70  3.27 in. (94.0  83.0 mm)
Displacement 210.9 cu. in. (3456 cm 3
)
Valve clearance (engine cold) Automatic adjustment
Drive belt tension Automatic adjustment
Fuel Fuel type Unleaded gasoline only
Octane Rating 87 (Research Octane Number 91) or higher
Fuel tank capacity (Reference) 19.2 gal. (72.5 L, 15.9 Imp. gal.)
Lubrication system Oil capacity
(Drain and refill - reference
* )
With filter 
Vehicles with towing package
5.8 qt. (5.5 L, 4.8 Imp. qt.) 
Vehicles without towing package
5.7 qt. (5.4 L, 4.8 Imp. qt.)
Without filter 5.6 qt. (5.3 L, 4.7 Imp. qt.)

7019-1. Specifications
9
Vehicle specifications
RX350/RX350L_U ■
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 be fore 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 ve hicle is operated at high speeds, or
under extreme lo ad 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

702 9-1. Specifications
RX350/RX350L_U * : The coolant capacity is a reference quantity.
If replacement is necessary, contact your Lexus dealer.Cooling system Capacity
* 
RX350 (Vehicles with out towing package)
9.5 qt. (9.0 L, 7.9 Imp. qt.) 
RX350 (Vehicles with towing package)
10.5 qt. (9.9 L, 8.7 Imp. qt.) 
RX350L
13.1 qt. (12.4 L, 11 Imp. qt.)
Coolant type Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol-based
non-silicate, non-amine, non-nitrite, and non-
borate coolant with long-life hybrid organic
acid technology
Do not use plain water alone.
Ignition system (spark plug) Make DENSO FK20HBR8
Gap 0.03 in. (0.8 mm)
NOTICE ■
Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark plug gap.
Electrical system Battery
Open voltage at 68  F (20  C): 12.6 V or higher: Fully charged
12.2 — 12.4 V: Half charged
12.0 V or lower: Discharged
(Turn the engine switch off and turn on the head-
lights for 20 to 30 seconds.)
Charging rates 5 A max.

704 9-1. Specifications
RX350/RX350L_U * : Minimum pedal clearance when depressed wi th a force of 110 lbf (490 N, 50.0 kgf)
while the engine is running. 
Type ABrakes Pedal clearance
* 3.4 in. (86 mm) Min.
Brake pad wear limit 0.04 in. (1.0 mm)
Pedal free play 0.04 — 0.24 in. (1.0 — 6.0 mm)
Fluid type FMVSS No. 116 DOT 3 or SAE J1703
Steering Free play Less than 1.2 in. (30 mm)
Tires and wheels Tire size 235/65R18 106V, T165/90D18 107M (spare)
Tire inflation pressure
(Recommended cold tire
inflation pressure) 
Front tire
33 psi (230 kPa, 2.3 kgf/cm 2
or bar) 
Rear tire
33 psi (230 kPa, 2.3 kgf/cm 2
or bar) 
Spare tire
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 and rear tires. Never exceed the maximum
cold tire inflation pressu re indicated on the tire
sidewall.
Wheel size 18  8 J, 18  4 T (spare)
Wheel nut torque 76 ft•lbf (103 N•m, 10.5 kgf•m)

706 9-1. Specifications
RX350/RX350L_U ■
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 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.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.

7079-1. Specifications
9
Vehicle specifications
RX350/RX350L_U ■
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. 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 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 gasoline that contains MMT. If fuel containing
MMT is used, your emission control system may be ad versely 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
containing more than
15% ethanol.
(30% ethanol)
(50% ethanol)
(85% ethanol)

708 9-1. Specifications
RX350/RX350L_U 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 will cause pe rsistent heavy knocking.
At worst, this will lead 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.

716 9-1. Specifications
RX350/RX350L_U 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 no t been driven more than 1
mile or 1.5 km un der that condition
Maximum inflation pres-
sure The maximum cold inflated pr essure 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 exce ss 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 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