Quick Summary
Looking for the correct oil type for your 1989 Buick RIVIERA? According to factory specs, the 3.8L 6 -cyl Engine Code [C] LN3 C requires 10W-30 viscosity oil. Using the right oil capacity of 4.5 QUARTS ensures engine longevity and fuel efficiency.
๐ข๏ธ 3.8L 6 -cyl Engine Code [C] LN3 C
Verified Data
Capacity
4.5 QUART
Viscosity
10W-30
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Recommended Maintenance Products
Everything you need for a complete oil change
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Motor Oil
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Oil Filter
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Drain Plug Gasket
Replace every oil change - don't reuse!
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Oil Drain Pan
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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 1989 Buick RIVIERA
Get vehicle-specific repair guides for these codes