Kia Optima 2017 Owner's Manual page 600

Maintenance
Normal Maintenance Schedule - For Gasoline Engine [For Europe (Except Russia)]
Number of months or driving distance, whichever comes first
MAINTENANCE INTERVALS Months
Miles×1,000
Km×1,000
MAINTENANCE ITEM
Nu 2.0L CVVL
Engine oil and engine oil fil‐
Theta II 2.4L MPI
*4
ter
Theta II 2.0L T-
GDI
*1
Coolant (Engine)
*2
Drive belts (Engine)
Theta II 2.4L MPI
*9
Valve clearance
Theta II 2.0L T-
GDI
Vacuum hoses and crankcase ventilation hoses
Nu 2.0L CVVL
Theta II 2.4L MPI
*10
Spark plugs
Theta II 2.0L T-
GDI
8-14
12 24 36 48
10 20 30 40
15 30 45 60
R R R R
R R R R
Replace every 10,000 km (6,500 miles) or 12 months
At first, replace 210,000 km (140,000 miles) or 120 months
After that, replace every 30,000 km (20,000 miles) or 24 months
At first, inspect 90,000 km (60,000 miles) or 72 months
After that, inspect every 30,000 km (20,000 miles) or 24 months
- - - -
- - - -
I I I I
Replace every 150,000 km (100,000 miles) or 120 months
Replace every 45,000 km (30,000 miles) or 36 months
Replace every 75,000 km (50,000 miles) or 60 months
60 72 84 96
50 60 70 80
75 90 105 120
R R R R
R R R R
- I - -
- I - -
I I I I