2023 HYUNDAI SONATA oil viscosity

Vehicle Information and Reporting Safety Defects
2-14
rECommEnDED luBriCants anD CaPaCitiEs
To help achieve proper engine and powertrain performance and durability, use only
lubricants of the proper quality. The correct lubricants also help promote engine
efficiency that results in improved fuel economy.
These lubricants and fluids are recommended for use in your vehicle.
Lubricant Volume Classification
Engine oil *1

(drain and refill) Smartstream
G1.6 T-GDi 4.8
ℓ (5.07 US qt.)
SAE 0W-20 / API SN PLUS/SP or
ILSAC GF-6 *2
Smartstream G2.5 GDi 5.8 ℓ (6.13 US qt.)
Smartstream
G2.5 T-GDi 6.13 US qt. (5.8 ℓ)
SAE 0W-30 API SN PLUS /SP or
ILSAC GF-6 *
2
Automatic transmission fluid 6.5 ℓ (6.89 US qt.) MICHANG ATF SP-IV, SK ATF SP IV,
NOCA ATF SP-IV, S-oil ATF SP-IV
HYUNDAI genuine ATF SP-IV
Dual clutch
transmission fluid Gear oil
3.3~3.4 L
(3.49~3.59 U.S.qt) GS WDCTF HD G(GS CALTEX)
Control oil 2.45~2.5 L
(2.59~2.64 U.S.qt) GS WDCTF HD H(GS CALTEX)
Coolant Smartstream
G1.6 T-GDi
8.03 US qt. (7.6 ℓ)
Mixture of antifreeze and distilled
water (Ethylene glycol base coolant
for aluminum radiator)
Smartstream G2.5 GDi
9.07 US qt. (8.59 ℓ)
Smartstream
G2.5 T-GDi 8.59 US qt. (8.13 ℓ)
Brake fluid *2
0.7 ~ 0.8
ℓ
(0.74 ~ 0.85 US qt.) DOT-4
Fuel 60
ℓ (15.85 US gal.)
56 ℓ (14.79 US gal.)
(for ECO package model) Refer to “Fuel requirements” in
chapter 1.
*1 : Refer to the recommended SAE viscosity numbers on page 12.
*2 : Requires < API SN PLUS (or above) Full synthetic> grade engine oil.

02
2-15
Recommended SAE Viscosity Number
CAUTION
Always be sure to clean the area around
any filler plug, drain plug, or dipstick
before checking or draining any
lubricant. This is especially important
in dusty or sandy areas and when the
vehicle is used on unpaved roads.
Cleaning the plug and dipstick areas
will prevent dirt and grit from entering
the engine and other mechanisms that
could be damaged. Engine oil viscosity (thickness) has an
effect on fuel economy and cold weather
operating (engine start and engine oil
flowability). Lower viscosity engine oils
can provide better fuel economy and
cold weather performance, however,
higher viscosity engine oils are required
for satisfactory lubrication in hot
weather.
Using oils of any viscosity other than
those recommended could result in engine damage. When choosing an oil, consider the
range of temperature your vehicle will be
operated in before the next oil change.
Proceed to select the recommended oil
viscosity from the chart.
Temperature Range for SAE Viscosity Numbers
Temperature °C
-30-20 -10 0 10 20 30 40 50
(°F) -100 20 40 60 80 100 120
Engine Oil * 1Smartstream
G1.6 T-GDI
Smartstream G2.5 GDI
Smartstream G2.5 T-GDI
0W-30
0W-20
* 1
: Requires grade engine oil.
An engine oil displaying this American Petroleum Institute(API) Certification
Mark conforms to the International Lubricant Specification Advisory Committee
(ILSAC). It is recommended to only use engine oils that uphold this API
Certification Mark.

While Driving
6-154
Winter Precautions
Use high quality ethylene glycol
coolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type of
coolant that should be used because it
helps prevent corrosion in the cooling
system, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 8. Before winter, have your
coolant tested to assure that its freezing
point is sufficient for the temperatures
anticipated during the winter.
Change to "winter weight" oil if necessary
In some climates it is recommended that
a lower viscosity "winter weight" oil be
used during cold weather. See chapter 8
for recommendations. If you aren't sure
what weight oil you should use, consult
an authorized HYUNDAI dealer.
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the
battery and cables as described in
chapter 8. The level of charge in your
battery can be checked by an authorized
HYUNDAI dealer or a service station.Check spark plugs and ignition
system
Inspect your spark plugs as described in
chapter 8 and replace them if necessary. Also check all ignition wiring and
components to be sure they are not
cracked, worn or damaged in any way.
Use approved window washer anti-
freeze in system
To keep the water in the window washer
system from freezing, add an approved
window washer anti-freeze solution in
accordance with instructions on the
container. Window washer anti-freeze is
available from an authorized HYUNDAI
dealer and most auto parts outlets. Do
not use engine coolant or other types
of antifreeze as these may damage the
paint finish.
Do not let your parking brake freeze
Under some conditions your parking
brake can freeze in the engaged position.
This is most likely to happen when
there is an accumulation of snow or
ice around or near the rear brakes or
if the brakes are wet. If there is a risk
the parking brake may freeze, apply
it only temporarily while you put the
gear selector lever in P and block the
rear wheels so the car cannot roll. Then
release the parking brake.