Kia Optima 2017 Owner's Manual page 602

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
Brake/clutch (if equipped) fluid
Parking brake
Steering gear rack, linkage and boots
Suspension ball joints
Tire (pressure & tread wear)
Battery condition
Maintenance Operation
R: Replace or change
I: Inspect and if necessary, adjust, correct, clean or replace
8-16
12 24 36 48
10 20 30 40
15 30 45 60
I R I R
- I - I
I I I I
I I I I
I I I I
I I I I
60 72 84 96
50 60 70 80
75 90 105 120
I R I R
- I - I
I I I I
I I I I
I I I I
I I I I