The oil capacity for a 1991 Buick Century 3.3 is approximately 5 quarts. The recommended oil type is 10 W 30.
The oil capacity for an oil and filter change is 4.5qts. If you choose to not change the filter it would only be 4.0qts of oil. qts=quarts.
SHOULD BE 5 QUATS
what type of engine??
The Buick needs 5qts of SAE 5W-30.
4.5 quarts of 5W-30
should be located on front of engine above the oil filter.
5w30 Any premium brand high detergent oil.
If it has a four cyl engine it takes 4 qts of oil, if its a v6 it takes 4.5 qts of oil.