Buick 1995 Century Owner's Manual page 284

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Maintenance Schedule I
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90,000 Miles (150 000 km) (Continued)
0
Rotate tires. See "Tire Inspection and
Rotation" in the Index for proper rotation
pattern and additional information.
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DATE ACTUAL MILEAGE SERVICED BY:
93,000 Miles (155 000 km)
0
Change engine oil and filter (or every
3 months, whichever occurs first).
An Emission Control Service.
DATE SERVICED B Y ACTUAL MILEAGE
7-24