Extensive idling or low-speed driving for long distances, as in heavy commercial use (such
as delivery, taxi, patrol car or livery)
Change engine oil and filter as indicated by information
display and perform services listed in the Normal Sched-
uled Maintenance chart.
As required
Replace cabin air filter.Inspect frequently, service
as required
Replace engine air filter.
Change automatic transmission fluid.Every 30000 miles (48000
km)
Replace spark plugs.Every 60000 miles (96000
km)
Operating in dusty or sandy conditions (such as unpaved or dusty roads)
Replace cabin air filter.Inspect frequently, service
as required
Replace engine air filter.
Inspect the wheels and related components for abnormal
noise, wear, looseness or drag.
Every 5000 miles (8000 km)
Rotate tires, inspect tires for wear and measure tread
depth.
Change engine oil and filter.
*
Every 5000 miles (8000 km)
or six months
Perform multi-point inspection.
Change automatic transmission fluid.Every 30000 miles (48000
km)
*
Reset your Intelligent Oil-Life Monitor after engine oil and filter changes. See Engine
Oil Check (page 250).
421
MKZ (CC9) , enUSA
Scheduled Maintenance
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