Kia Optima 2017, Owner'S Manual, Page: 605 / 776

Normal Maintenance Schedule - For Gasoline Engine [Except Europe (Including Russia)]
The following maintenance services must be performed to ensure good emission control and performance. Keep receipts for
all vehicle emission services to protect your warranty. Where both mileage and time are shown, the frequency of service is
determined by whichever occurs first.
NO. ITEM REMARK
*1 Coolant (Engine)
When adding coolant, use only deionized 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.
*2 Drive belts (Engine)
• Adjust alternator, water pump and air conditioner (if equipped) drive belt.
Inspect and if necessary repair or replace.
• Inspect drive belt tensioner, idler and alternator pulley and if necessary cor‐
rect or replace.
*3 Dual clutch transmission (DCT) fluid Dual clutch transmission (DCT) fluid should be changed anytime it has been
submerged in water.
*4 Engine oil and engine oil filter
Check the engine oil level and leak every 500 km (350 miles) or before start‐
ing a long trip.
*5
Engine oil and engine oil filter
(For Diesel Engine)
• If the recommended oil is not available, replace engine oil and engine oil fil‐
ter every 20,000 km (13,000 miles) or 12 months.
• The engine oil level should be checked regularly and maintained properly.
Operating with an insufficient amount oil can damage the engine, and such
damage is not covered by warranty.
• This maintenance schedule depends on fuel quality. It is applicable only
when using a qualified fuel <"EN590 or equivalent">. If the diesel fuel speci‐
fications don't meet the EN590, it must be replaced according to the severe
maintenance schedule.
8-19
8
Maintenance