Severe Service Maintenance — Non-Turbo Models
The following items must be serviced more frequently on vehicles normally operated under severe driving conditions. See the table below for the applicable maintenance intervals.
R: Replace
I: Inspect and, if necessary, clean, adjust, repair or replace as required


Severe Driving Conditions
A- Repeated short trips of less than 8 km (5 miles) in normal temperatures, or less than 16 km (10 miles) in freezing temperatures.
B- Extended idling or low-speed driving over long distances
C- Driving on rough, dusty, muddy, unpaved, gravel or salted roads
D - Driving in areas where salt or other corrosive materials are used, or in very cold weather.
Driving in severely dusty conditions
F - Driving in heavy traffic
G - Repeated driving on hills, descents or mountain roads.
H - Towing a trailer, using a camper, or carrying a roof rack
I - Driving as a police car, taxi, or for other commercial use, or towing vehicles.
J- Driving at speeds over 170 km/h
K - Frequent driving in stop-and-go conditions
Test yourself
A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.