Kia Optima 2017 Owner's Manual page 625

Normal Maintenance Schedule - For Diesel Engine [Except Europe (Including Russia)]
MAINTENANCE IN‐
Months
TERVALS
Miles×1,000
Km×1,000
MAINTENANCE ITEM
Battery condition
Maintenance Operation
R: Replace or change
I: Inspect and if necessary, adjust, correct, clean or replace
Number of months or driving distance, whichever comes first
12 24 36
10 20 30
15 30 45
I I I
48 60 72 84
40 50 60 70
60 75 90 105
I I I I
96
80
120
I
8
8-39