Page 518 of 740
518
PRIUS_OM_OM47E09U_(U)
6-3. Do-it-yourself maintenance
Engine compartment
Engine coolant reservoir ( P. 522)
Fuse boxes  ( P. 563)
Engine oil level dipstick  ( P. 519)
Engine oil filler cap ( P. 520)
Brake fluid reservoir ( P. 528) 12-volt battery (
P. 524)
Power control  unit coolant 
reservoir  ( P. 522)
Radiator  ( P. 524)
Condenser  ( P. 524)
Electric cooling fans
Washer fluid tank  ( P. 530)1
2
3
4
5
6
7
8
9
10
11 
     
        
        Page 519 of 740
PRIUS_OM_OM47E09U_(U)
5196-3. Do-it-yourself maintenance
6
Maintenance and care
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
■Checking the engine oil
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.
Holding  a  rag  under  the  end,
pull the dipstick out.
Wipe the dipstick clean.
Reinsert the dipstick fully.
Holding  a  rag  under  the  end,  pull  the  dipstick  out  and  check  th e
oil level.
Low
Normal
Excessive
Wipe the dipstick and reinsert it fully.
Engine oil
1
2
3
4
5
1
2
3
6 
     
        
        Page 520 of 740

520
PRIUS_OM_OM47E09U_(U)
6-3. Do-it-yourself maintenance
■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.
Make  sure  to  check  the  oil  type  and  prepare  the  items  needed
before adding oil.Remove the oil fille r cap by turning it counterclockwise.
Add engine oil slowly,  checking the dipstick.
Install the oil filler cap  by turning it clockwise.
■Engine oil consumption
A certain amount of engine oil will be consumed while driving.  In the following
situations,  oil  consumption  may  increase,  and  engine  oil  may  ne ed  to  be
refilled in between oil maintenance intervals.
● When the engine is new, for example directly after purchasing t he 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
Engine oil selectionP. 668
Oil quantity (Low  Full)1.6 qt. (1.5 L, 1.3 Imp.qt.)
ItemsClean funnel
1
2
3 
     
        
        Page 521 of 740

PRIUS_OM_OM47E09U_(U)
5216-3. Do-it-yourself maintenance
6
Maintenance and care
WARNING
■Used engine oil
● Used  engine  oil  contains  potentially  harmful  contaminants  which  may
cause  skin  disorders  such  as  inflammation  and  skin  cancer,  so  c are
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 sewe rs or onto the
ground.  Call  your  Toyota  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 v ehicle.
● Be sure the engine oil filler cap is properly tightened. 
     
        
        Page 668 of 740
![TOYOTA PRIUS 2021  Owners Manual (in English) 668
PRIUS_OM_OM47E09U_(U)
8-1. Specifications
■Oil capacity (Drain and refill [Reference*])
*: The engine oil  capacity is a reference  quantity to be  used when changing
the  engine  oil.  Park  th TOYOTA PRIUS 2021  Owners Manual (in English) 668
PRIUS_OM_OM47E09U_(U)
8-1. Specifications
■Oil capacity (Drain and refill [Reference*])
*: The engine oil  capacity is a reference  quantity to be  used when changing
the  engine  oil.  Park  th](/manual-img/14/42657/w960_42657-667.png)
668
PRIUS_OM_OM47E09U_(U)
8-1. Specifications
■Oil capacity (Drain and refill [Reference*])
*: The engine oil  capacity is a reference  quantity to be  used when changing
the  engine  oil.  Park  the  vehicle  on  level  ground.  After  warming   up  the
engine  and  turning  off  the  hybrid  system,  wait  more  than  5  minu tes,  and
check the oil level on the dipstick.
■
Engine oil selection
“Toyota  Genuine  Motor  Oil”  is  used  in  your  Toyota  vehicle.  Use
Toyota approved “Toyota Genuine Motor Oil” or equivalent to sat isfy
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.
Oil viscosity (0W-16 is expl ained here as an example):
• The  0W  in  0W-16  indicates  the  characteristic  of  the  oil  which allows cold startability. Oils wi th a lower value before the W allow
for easier starting of the engine in cold weather.
• The  16  in  0W-16  indicates  the  vi scosity  characteristic  of  the oil
when the oil is at high temperature. An oil with a higher visco sity
(one  with  a  higher  value)  may  be  better  suited  if  the  vehicle  i s
operated at high speeds, or un der extreme load conditions.
Lubrication system
With filter4.4 qt. (4.2 L, 3.7 Imp.qt.)
Without filter4.1 qt. (3.9 L, 3.4 Imp.qt.)
Outside temperature