Page 318 of 456
3186-3. Do-it-yourself maintenance
Fuse boxes (P.341)
Engine oil filler cap ( P.319)
Engine oil level dipstick ( P.318)
Brake fluid reservoir ( P.322)
Radiator ( P.321)
Electric cooling fan
Condenser ( P.321)
Power control unit coolant reservoir ( P.321)
Engine coolant reservoir ( P.320)
Washer fluid tank ( P.322)
■12-volt battery
 P.323
With the engine at operating tempera-
ture and turned off, check the oil level 
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
Checking and adding the engine 
oil 
     
        
        Page 319 of 456

3196-3. Do-it-yourself maintenance
6
Maintenance and care
on the dipstick.
■Checking the engine oil
1 Park the vehicle on level ground.
After warming up the engine and turning 
off the hybrid system, wait more than 5 
minutes for the oil to drain back into the 
bottom of the engine.
2Holding a rag under the end, pull 
the dipstick out.
3 Wipe the dipstick clean.
4 Reinsert the dipstick fully.
5 Holding a rag under the end, pull 
the dipstick out and check the oil 
level.
Low
Normal
Excessive
The shape of the dipstick may differ 
depending on the type of vehicle or 
engine.
6Wipe the dipstick and reinsert it 
fully.
■Checking the oil type and prepar-
ing the items needed
Make sure to check the oil type and 
prepare the items needed before add-
ing oil.
 Engine oil selection
P.396
 Oil quantity (Low   Full)
1.6 qt. (1.5 L, 1.3 Imp.qt.)
Item
Clean funnel
■Adding engine oil
If the oil level is below or near the low 
level mark, add engine oil of the same 
type as that already in the engine.
1 Remove the oil filler cap by turning 
it counterclockwise.
2 Add engine oil slowly, checking the 
dipstick.
3 Install the oil filler cap by turning it 
clockwise.
■Engine oil consumption
A certain amount of engine oil will be con-
sumed while driving. In the following situa-
tions, oil consumption may increase, and 
engine oil may need  to be refilled in 
A
B
C 
     
        
        Page 320 of 456

3206-3. Do-it-yourself maintenance
between oil maintenance intervals.
●When the engine is new, for example 
directly after purchasing the vehicle or 
after replacing the engine
●If low quality oil or oil of an inappropriate 
viscosity is used
●When driving at high engine speeds or 
with a heavy load, or when driving while 
accelerating or decelerating frequently
●When leaving the engine idling for a long 
time, or when driving frequently through 
heavy traffic
■After changing the engine oil
The engine oil maintenance data should be 
reset. Perform the following procedures:
1
While the vehicle is stopped, press 
 of the meter control switches.
2
Press   or   of the meter control 
switches, and select  .
3
Press   or   of the meter control 
switches, select “Veh icle Settings”, and 
then press “OK”.
4
Press   or   of the meter control 
switches, select “Oil Maintenance”, and 
then press “OK”.
5
Select “Yes” and then press “OK”.
A message will be displayed on the multi-
information display.
The coolant level is satisfactory if it is 
between the “F”/“FULL” and 
“L”/“LOW” lines on the reservoir when 
the hybrid system is cold.
■Engine coolant reservoir
WARNING
■Used engine oil
●Used engine oil contains potentially 
harmful contaminants which may 
cause skin disorders such as inflamma-
tion and skin cancer, so care should be 
taken to avoid prolonged and 
repeated contact. To remove used 
engine oil from your skin, wash thor-
oughly with soap and water.
●Dispose of used oil and filters only in a 
safe and acceptable manner. Do not 
dispose of used oil and filters in house-
hold trash, in sewers or onto the 
ground. 
Call your Lexus dealer, service station 
or auto parts store for information 
concerning recycling or disposal.
●Do not leave used engine oil within the 
reach of children.
NOTICE
■To prevent serious engine damage
Check the oil level on a regular basis.
■When replacing the engine oil
●Be careful not to spill engine oil on the 
vehicle components.
●Avoid overfilling, or the engine could 
be damaged.
●Check the oil level on the dipstick 
every time you refill the vehicle.
●Be sure the engine o il filler cap is prop-
erly tightened.
Checking the coolant 
     
        
        Page 396 of 456
![Lexus ES300h 2019  Owners Manual (OM06178U) 3968-1. Specifications
■Oil capacity (Drain and refill [Ref-
erence
*])
*: The engine oil capacity is a reference quantity to be used when changing the 
engine oil. Warm up the engine and turn 
off  Lexus ES300h 2019  Owners Manual (OM06178U) 3968-1. Specifications
■Oil capacity (Drain and refill [Ref-
erence
*])
*: The engine oil capacity is a reference quantity to be used when changing the 
engine oil. Warm up the engine and turn 
off](/manual-img/36/12858/w960_12858-395.png)
3968-1. Specifications
■Oil capacity (Drain and refill [Ref-
erence
*])
*: The engine oil capacity is a reference quantity to be used when changing the 
engine oil. Warm up the engine and turn 
off the hybrid system, wait more than 5 
minutes, and check the oil level on the 
dipstick.
■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: API SN/RC multigrade 
engine oil
Recommended viscosity: SAE 0W-16 SAE 0W-16 is the best choice for good 
fuel economy and good
 starting in cold 
weather.
If SAE 0W-16 is not available, SAE 
0W-20 oil may be used. However, it 
must be replaced with SAE 0W-16 at 
the next oil change.
Outside temperature
Oil viscosity (0W-16 is explained here 
as an example):
• The 0W in 0W-16 indicates the  characteristic of the oil which allows 
Electric motor (traction motor)
TypePermanent magnet synchronous motor
Maximum output88 kW
Maximum torque149 ft•lbf (202 N•m, 20.6 kgf•m)
Hybrid battery (traction battery)
TypeNickel-metal hydride battery
Voltage7.2 V/cell
Capacity6.5 Ah (3HR)
Quantity34 modules
Overall voltage244.8 V
Lubrication system
With filter4.8 qt. (4.5 L, 4.0 Imp.qt.)
Without filter4.4 qt. (4.2 L, 3.7 Imp.qt.)
A