2023 TOYOTA PRIUS PRIME engine oil

4947-2. Maintenance
7-2.Maintenance
■Repair and replacement
It is recommended that genuine
Toyota parts be used for repairs to
ensure performance of each sys-
tem. If non-Toyota parts are used in
replacement or if a repair shop other
than a Toyota dealer performs
repairs, confirm the warranty cover-
age.
■Allow inspection and repairs to
be performed by a Toyota
dealer
●Toyota technicians are well-
trained specialists and are kept up
to date with the latest service
information. They are well
informed about the operations of
all systems on your vehicle.
●Keep a copy of the repair order. It
proves that the maintenance that
has been performed is under war-
ranty coverage. If any problem
should arise while your vehicle is
under warranty, your Toyota
dealer will promptly take care of it.
General maintenance should be
performed on a daily basis. This
can be done by yourself or by a
Toyota dealer.
Scheduled maintenance should
be performed at specified inter-
vals according to the mainte-
nance schedule.
For details about maintenance
items and schedules, refer to the
“Scheduled Maintenance Guide” or
“Owner’s Manual Supplement”.
Maintenance require-
ments
To ensure safe and econom-
ical driving, day-to-day care
and regular maintenance
are essential. It is the
owner’s responsibility to
perform regular checks.
Toyota recommends the fol-
lowing maintenance:
WARNING
■If your vehicle is not properly
maintained
Improper maintenance could
result in serious damage to the
vehicle and possible death or seri-
ous injury.
■Handling of the 12-volt bat-
tery
●Engine exhaust, some of its
constituents, and a wide variety
of automobile components con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects and
other reproductive harm. Work
in a well ventilated area.
●Oils, fuels and fluids contained
in vehicles as well as waste pro-
duced by component wear con-
tain or emit chemicals known to
the State of California to cause
cancer and birth defects or
other reproductive harm. Avoid
exposure and wash any
affected area immediately.
●12-volt battery posts, terminals
and related accessories con-
tain lead and lead compounds
which are known to cause brain
damage. Wash your hands after
handling. ( P.512)
General maintenance
Scheduled maintenance

4957-2. Maintenance
7
Maintenance and care
■Resetting the message indicat-
ing maintenance is required
After the required maintenance is
performed according to the mainte-
nance schedule, please reset the
reminder light or message.
To reset the reminder light or mes-
sage, follow the procedure
described below:
1 Press or of the meter
control switches on the steering
wheel and select .
2 Press or of the meter
control switches and select
“ Vehicle Settings”.
Then press and hold .
3 Press or of the meter
control switches and select
“Scheduled Maintenance”, and
then press .
4 Select “Yes” and press .
You can perform some mainte-
nance procedures by yourself.
Please be aware that do-it-your-
self maintenance may affect
warranty coverage.
The use of Toyota Repair Manuals
is recommended.
For details about warranty cover-
age, refer to the separate “Owner’s
Warranty Information Booklet” or
“Owner’s Manual Supplement”.
Do-it-yourself mainte-
nance
General maintenance
Listed below are the general
maintenance items that
should be performed at the
intervals specified in the
“Owner’s Warranty Informa-
tion Booklet” or “Owner’s
Manual Supplement/Sched-
uled Maintenance Guide”. It
is recommended that any
problem you notice should
be brought to the attention
of your Toyota dealer or
qualified service shop for
advice.
WARNING
■If the hybrid system is run-
ning
Turn the hybrid system off and
ensure that there is adequate
ventilation before performing
maintenance checks.
Engine compartment
ItemsCheck points
Brake fluid
Is the brake fluid at
the correct level?
(  P.509)
Engine/power
control unit
coolant
Is the
engine/power con-
trol unit coolant at
the correct level?
( P.507)
Engine oil
Is the engine oil at
the correct level?
( P.504)

4997-3. Do-it-yourself maintenance
7
Maintenance and care
7-3.Do-it-yourself maintenance
Do-it-yourself service
precautions
If you perform maintenance
by yourself, be sure to fol-
low the correct procedure as
given in these sections.
Maintenance
ItemsParts and tools
12-volt bat-
tery condi-
tion
( P.513)•Grease
• Conventional
wrench (for termi-
nal clamp bolts)
Brake fluid
level
( P.509)
• FMVSS No.116
DOT 3 or SAE
J1703 brake fluid
• FMVSS No.116 DOT 4 or SAE
J1704 brake fluid
• Rag or paper towel
• Funnel (used only for adding brake
fluid)
Engine/power
control unit
coolant level
( P.507)
• “Toyota Super
Long Life Cool-
ant” or a similar
high quality eth-
ylene glycol-based
non-silicate, non-
amine, non-nitrite
and non-borate
coolant with long-
life hybrid organic
acid technology
For the U.S.A.:
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 50% coolant
and 50% deion-
ized water.
For Canada:
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 55% coolant
and 45% deion-
ized water.
• Funnel (used only for adding coolant)
Engine oil
level
( P.504)
• “Toyota Genuine
Motor Oil” or
equivalent
• Rag or paper towel
• Funnel (used only for adding engine
oil)
Fuses
( P.540)• Fuse with same
amperage rating
as original
Headlight aim
( P.542)• Phillips-head
screwdriver
ItemsParts and tools

5007-3. Do-it-yourself maintenance
Radiator and
condenser
( P.508)

Tire inflation
pressure
( P.532)• Tire pressure
gauge
• Compressed air source
Washer fluid
( P.510)
• Water or washer
fluid containing
antifreeze (for win-
ter use)
• Funnel (used only for adding water or
washer fluid)
WARNING
The engine compartment contains
many mechanisms and fluids that
may move suddenly, become hot,
or become electrically energized.
To avoid death or serious injury,
observe the following precautions.
■When working on the engine
compartment
●Make sure that “POWER ON”
on the meter and the “READY”
indicator are both off.
●Keep hands, clothing and tools
away from the moving fan.
●Be careful not to touch the
engine, power control unit, radi-
ator, exhaust manifold, etc. right
after driving as they may be hot.
Oil and other fluids may also be
hot.
●Do not leave anything that may
burn easily, such as paper and
rags, in the engine compart-
ment.
ItemsParts and tools●Do not smoke, cause sparks or
expose an open flame to fuel or
the battery. Fuel and battery
fumes are flammable.
■When working near the elec-
tric cooling fan or radiator
grille
Be sure the power switch is OFF.
With the power switch in ON, the
electric cooling fan may automati-
cally start to run if the air condi-
tioning is on and/or the coolant
temperature is high. ( P.508)
■Safety glasses
Wear safety glasses to prevent
flying or falling material, fluid
spray, etc., from getting in your
eyes.
NOTICE
■If you remove the air cleaner
filter
Driving with the air cleaner filter
removed may cause excessive
engine wear due to dirt in the air.

5047-3. Do-it-yourself maintenance
Engine oil filler cap (P.506)
Engine oil level dipstick ( P.504)
Brake fluid reservoir ( P.509)
Fuse boxes ( P.540)
Washer fluid tank ( P.510)
Radiator ( P.508)
Electric cooling fan
Condenser ( P.508)
Power control unit coolant reservoir ( P.507)
Engine coolant reservoir ( P.507)
■12-volt battery
 P.511
With the engine at operating
temperature and turned off,
check the oil level on the dip-
Engine compartment
Components
A
B
C
D
E
F
G
H
I
J
Checking the engine oil

5057-3. Do-it-yourself maintenance
7
Maintenance and care
stick.
1Park the vehicle on level
ground. After warming up the
engine and turning off the
hybrid system, wait about 5
minutes for the oil to drain
back into the bottom of the
engine.
2 Holding 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 whether the oil level is
above low level mark.
Low level mark
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
6Wipe the dipstick and reinsert
it fully.
■Engine oil consumption
A certain amount of engine oil will
be consumed while driving. In the
following situations, oil consump-
tion may increase, and engine oil
may need to be re filled in 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 inap-
propriate 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 fre-
quently through heavy traffic
■Engine oil level rise
If the vehicle is repeatedly driven
without the engine warmed up,
moisture caused by dew condensa-
tion inside the engine or fuel which
did not burn mixes into the engine
oil, resulting in a rise in engine oil
level.
However, this is not a malfunction.
For example, the engine become
difficult to be warmed up in the fol-
lowing situations.
●When driving a short distance
●When driving at a low speed
●When the outside temperature is
low
When checking the engine oil, make
A
NOTICE
■To prevent serious engine
damage
Check the oil le vel on a regular
basis.

5067-3. Do-it-yourself maintenance
sure that the engine is warmed up. If
the engine oil level exceeds the refill
upper limit mark, contact your
Toyota dealer.
■Checking the oil type and
preparing the items needed
Make sure to check the oil type
and prepare the items needed
before adding oil.
 Engine oil selection
P.602
 Oil quantity (Low level mark
 Refill upper limit mark)
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, check-
ing the dipstick.
Make sure that the oil level does
not exceed the refill upper limit mark and is between the low level
mark and refill upp
er limit mark.
Low level mark
Refill upper limit mark
The shape of the dipstick may differ
depending on the type of vehicle or
engine.
3Install the oil filler cap by
turning it clockwise.
■After changing the engine
oil
The engine oil maintenance
data should be reset. Perform
the following procedures:
1 Press or of the meter
control switches and select
on the multi-information
display.
2 Press or of the meter
control switches and select
“ Vehicle Settings”. Then
press and hold .
3 Press or of the meter
control switches and select
“Oil Maintenance”. Then
press .
4 Select “Yes” and press .
Adding engine oil
A
B

5077-3. Do-it-yourself maintenance
7
Maintenance and care
The coolant level is satisfactory
if it is between the “MAX” and
“MIN” lines on the reservoir
when the hybrid system is cold.
■Engine coolant reservoirReservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
line. ( P.594)
■Power control unit coolant
reservoir
Reservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
WARNING
■Used engine oil
●Used engine oil contains poten-
tially harmful contaminants
which may cause skin disorders
such as inflammation and skin
cancer, so care should be taken
to avoid prolonged and
repeated contact. To remove
used engine oil from your skin,
wash thoroughly 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 household trash,
in sewers or onto the ground.
Call your Toyota dealer, service
station or auto parts store for
information concerning recy-
cling or disposal.
●Do not leave used engine oil
within the reach of children.
NOTICE
■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 dip-
stick every time you refill the
vehicle.
●Be sure the engine oil filler cap
is properly tightened.
■If oil is spilled on the engine
cover
To prevent the engine cover from
being damaged, remove any
engine oil from the engine cover
as soon as possible using a neu-
tral detergent. Do not use an
organic solvent such as brake
cleaner.
Checking the coolant
A
B
C
A
B
C