The following items must be serviced more frequently on cars mainly used under severe driving conditions. Refer to the chart below for the appropriate maintenance intervals.
R : Replace
I : Inspect and if necessary, adjust, correct, clean or replace
Severe driving conditions
A. Repeatedly driving short distance of less than 5 miles (8 km) in normal
temperature
or less than 10 miles (16 km) in freezing temperature
B. Extensive engine idling or low speed driving for long distances
C. Driving on rough, dusty, muddy, unpaved, graveled or saltspread roads
D. Driving in areas using salt or other corrosive materials or in very cold
weather
E. Driving in the condition of inflowing sand or dust into engine
F. Driving in heavy traffic area
G. Driving on uphill, downhill, or mountain roads
H. Towing a trailer
I. Driving for patrol car, taxi, commercial car or vehicle towing
J. Driving over 106 mph (170 km/h)
K. Frequently driving in stop-and-go conditions
L. Engine oil usage which is not recommended (mineral type, lower grade spec,
etc.)