Buick REGAL 1997 Manual page 373

Long Trip/Highway Maintenance Schedule
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I7
For supercharged engines only: Check the
supercharger oil level and add oil as needed
(or every 36 months, whichever occurs
first). See "Recommended Fluids and
Lubricants" in this section.
An Emission Control Service.
(See footnote?.)
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DATE ACTUAL MILEAGE SERVICED BY:
37,500 Miles (62 500 km)
0
Change engine oil and filter (or every
12 months, whichever occurs first).
An Emission Control Service.
(See footnote
*.)
0
Rotate tires. See "Tire Inspection and
Rotation" in the Index for proper rotation
pattern and additional information.
(See footnote +.)
DATE ACTUAL MILEAGE SERVICED BY:
7-31