Kia Optima Hybrid 2017 Owner's Manual page 570

Normal Maintenance Schedule - For Gasoline Engine [Except Europe (Including Russia)]
Number of months or driving distance, whichever comes first
MAINTENANCE INTERVALS Months
Miles×1,000
Km×1,000
MAINTENANCE ITEM
Suspension ball joints
Tire (pressure & tread wear)
Vacuum hoses and crankcase ventilation hoses
Vapor hose and fuel filler cap
I: Inspect and if necessary, adjust, correct, clean or replace.
R: Replace or change.
12 24 36 48
10 20 30 40
15 30 45 60
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 I I I
I I I I
I I I I
- - - I
9-17
9