Honda 1990 Civic Sedan Owner's Manual page 77

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6. Reinstall the filler cap securely.
7. Start the engine and make sure oil is not leaking from the drain
bolt or filter.
8. Shut off the engine and recheck the oil level.
NOTE:
Please dispose of used motor oil in a manner that is compatible with
the environment. We suggest you take it in a sealed container to
your local service station for reclamation. Do not throw it in the
trash or pour it on the ground.
CAUTION:
Used motor oil may cause skin cancer if repeatedly left in contact
with the skin for prolonged periods. Although this is unlikely
unless you handle used oil on a daily basis, it is still advisable to
thoroughly wash your hands with soap and water as soon as
possible after handling used oil.