Chevrolet Optra 2004 Owner's Manual page 307

90,000 Miles (150 000 km)
Change engine oil and filter (or every 12 months,
whichever occurs first). An Emission Control
Service.
Replace passenger compartment air filter. If you
drive regularly under dusty conditions, the filter
may require replacement more often.
Replace engine air cleaner filter. See Engine Air
Cleaner/Filter on page 5-18 for more information.
An Emission Control Service.
Rotate tires. See Tire Inspection and Rotation on
page 5-58 for proper rotation pattern and additional
information. (See footnote +.)
Replace spark plugs. An Emission Control Service.
Replace fuel filter. An Emission Control Service.
(See footnote †.)
Inspect drive belt(s).
Inspect timing belt.
Drain, flush and refill cooling system. See Engine
Coolant on page 5-21 for what to use. Inspect
hoses. Clean radiator, condenser, pressure cap and
neck. Pressure test the cooling system and
pressure cap. An Emission Control Service.
Inspect EVAP canister, vapor lines and solenoid
valve filter. An Emission Control Service. (See
footnote †.)
Inspect PCV system. An Emission Control Service.
(See footnote †.)
Change brake/clutch fluid (or every 24 months,
whichever occurs first).
97,500 Miles (162 500 km)
Change engine oil and filter (or every 12 months,
whichever occurs first). An Emission Control
Service.
Rotate tires. See Tire Inspection and Rotation on
page 5-58 for proper rotation pattern and additional
information. (See footnote +.)
6-17