Chevrolet Optra 2004 Owner's Manual page 300

54,000 Miles (90 000 km)
Change engine oil and filter (or every 3 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 +.)
57,000 Miles (95 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.
60,000 Miles (100 000 km)
Change engine oil and filter (or every 3 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 +.)
6-10
Replace spark plugs. An Emission Control Service.
Replace spark plug wires. An Emission Control
Service.
Inspect drive belt(s).
Replace 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 and vapor lines. Replace
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).
63,000 Miles (105 000 km)
Change engine oil and filter (or every 3 months,
whichever occurs first). An Emission Control Service.