Page 246 of 390

2466-3. Do-it-yourself maintenance
Light bulbs 
( P.272)
• Bulb with same num-
ber and wattage rat-
ing as original
• Phillips-head screw- driver
• Flathead screw- driver
• Wrench
Radiator, con-
denser and inter-
cooler radiator 
(  P.254)
Tire inflation pres-
sure ( P.263)• Tire pressure gauge
• Compressed air 
source
Washer fluid 
( P.256)
• Water or washer 
fluid containing anti-
freeze (for winter 
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 elec-
trically energized. To avoid death or seri-
ous injury, observe the following 
precautions.
■When working on the engine com-
partment
●Keep hands, clothi ng and tools away 
from the moving fans  and engine drive 
belt.
●Be careful not to touch the engine, 
radiator, exhaust manifold, etc. right 
after driving as they may be hot. Oil 
and other fluids may also be hot.
ItemsParts and tools●Do not leave anything that may burn 
easily, such as paper and rags, in the 
engine compartment.
●Do not smoke, cause sparks or expose 
an open flame to fuel or the battery. 
Fuel and battery fumes are flammable.
●Be extremely cautious when working 
on the battery. It contains poisonous 
and corrosive sulfuric acid.
■When working near the electric cool-
ing fans or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION 
ON mode, the electric cooling fans may 
automatically start to run if the air condi-
tioning is on and/or the coolant tempera-
ture is high. ( P.254)
■Safety glasses
Wear safety glasses to prevent flying or 
falling material, fluid spray, etc. from get-
ting 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. 
     
        
        Page 252 of 390

2526-3. Do-it-yourself maintenance
RC300
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 
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
Select   on the multi-information dis-
play. ( P.74)
2
Press the   or   meter control 
switch on the steering wheel to select 
“Vehicle Settings” then “Oil Mainte-
nance”. (To confirm setting, press  .) 3
Select “Yes” and then press  .
4
A message is displayed on the 
multi-information display.
The coolant level is satisfactory if it is 
between the “FULL” and “LOW” lines 
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, ser-
vice 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 322 of 390
![LEXUS RC300 2020  Owners Manual 3208-1. Specifications
■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the engine oil. Warm up and turn off the engine, wait LEXUS RC300 2020  Owners Manual 3208-1. Specifications
■Oil capacity (Drain and refill [Reference*])
*: The engine oil capacity is a reference quantity to be used when changing the engine oil. Warm up and turn off the engine, wait](/manual-img/36/58950/w960_58950-321.png)
3208-1. Specifications
■Oil capacity (Drain and refill [Reference*])
*: 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 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 starting 
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.
Fuel
Fuel typeUnleaded gasoline only
Octane Rating91 (Research Octane Number 96) or higher
Fuel tank capacity (Reference)17.5 gal. (66.3 L, 14.6 Imp. gal.)
Lubrication system
With filter
RC350
6.0 qt. (5.7 L, 5.0 Imp. qt.)
RC350 AWD/RC300 AWD
6.8 qt. (6.4 L, 5.6 Imp. qt.)
RC300
4.9 qt. (4.6 L, 4.0 Imp. qt.)
Without filter
RC350
5.8 qt. (5.5 L, 4.8 Imp. qt.)
RC350 AWD/RC300 AWD
6.3 qt. (6.0 L, 5.3 Imp. qt.)
RC300
4.5 qt. (4.3 L, 3.8 Imp. qt.)