Quick Summary
Looking for the correct oil type for your 1981 Buick CENTURY? According to factory specs, the 3.8L 6 -cyl Engine Code [A] A requires 10W-30 viscosity oil. Using the right oil capacity of 5.0 QUARTS ensures engine longevity and fuel efficiency.
๐ข๏ธ 3.8L 6 -cyl Engine Code [A] A Most Common
Verified Data
Capacity
5.0 QUART
Viscosity
10W-30
๐ข๏ธ 4.3L 8 -cyl Engine Code [S] S
Verified Data
Capacity
5.0 QUART
Viscosity
10W-30
๐ข๏ธ 4.4L 8 -cyl Engine Code [J] J
Verified Data
Capacity
5.0 QUART
Viscosity
10W-30
๐ข๏ธ 5.0L 8 -cyl Engine Code [H] H
Verified Data
Capacity
5.0 QUART
Viscosity
10W-30
๐ข๏ธ 5.7L 8 -cyl Engine Code [N] N Diesel
Diesel
Verified Data
Capacity
5.9 QUART
Viscosity
10W-30
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Recommended Maintenance Products
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Motor Oil
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Oil Filter
OEM or premium aftermarket options
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Drain Plug Gasket
Replace every oil change - don't reuse!
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Oil Drain Pan
Catch and store used oil safely
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Funnel Set
No-spill oil pouring
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Mechanic Gloves
Keep your hands clean
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Common Trouble Codes for 1981 Buick CENTURY
Get vehicle-specific repair guides for these codes