Kia Sorento 2023, Owner'S Manual, Page: 548 / 640

Maintenance
12 8
Scheduled maintenance service
*1. Fuel additives
Kia recommends that you use Tier 1
unleaded gasoline which has an octane
rating of RON (Research Octane Num
-
ber) 95/AKI (Anti Knock Index) 91 or
higher.
For customers who do not use good
quality gasolines including fuel addi
-
tives regularly, and have problems start
-
ing or the engine does not run smoothly,
one bottle of additives should be added
to the fuel tank at every 13,000
km (8,000 miles).
Additives are available from an autho
-
rized Kia dealer. Do not mix with other
additives.
*2. Engine oil and engine oil filter
As it is normal for engine oil to be con
-
sumed during driving, the engine oil
level should be checked on regular
basis.
The engine oil change interval for nor
-
mal operating conditions is based on the
use of the recommended engine specifi
-
cation. If the recommended engine oil
specification is not used, then replace
the engine oil according to the mainte
-
nance schedule under severe operating
conditions.
*3. Coolant (Engine)
When adding coolant, use only deion
-
ized water or soft water for your vehicle
and never mix hard water in the coolant
filled at the factory. An improper coolant
mixture can result in serious malfunction
or engine damage.
*4. Coolant (HEV Inverter)
When adding coolant, use only deion
-
ized water or soft water for your vehicle
and never mix hard water in the coolant
filled at the factory. An improper coolant
mixture can result in serious malfunction
or engine damage.
*5. Coolant (PHEV Inverter)
Have the coolant replaced by an autho -
rized Kia dealer.
*6. HSG (Hybrid Starter & Gener
-
ator) belt
Inspect HSG belt for evidence of cuts,
cracks, excessive wear or oil saturation
and replace if necessary.
*7. Differential oil (rear) (AWD)
If the vehicle has been submerged in
water or in a flooded area, the fluids
should be changed as a precaution.
Differential oil (rear) (AWD)
*7
Inspect every 65,000 km (40,000 miles) or 48 months
Transfer case oil (AWD)
*8
Automatic transmis
-
sion (AT) fluid
Smartstream G1.6 T-GDi HEV/
PHEV
No service required
Number of months or driving distance, whichever comes first
Months 12 24 36 48 60 72 84 96 108 120 132 144
Miles×1,000 8 16 24 32 40 48 56 64 72 80 88 96
Km×1,000 13 26 39 52 65 78 91 104 117 130 143 156