1990 Buick Estate Wagon Oil Type & Capacity
The 1990 Buick Estate Wagon takes 5W-30 motor oil — 4.0 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Estate Wagon | API - SAE 5W-30 (Preferred), 10W-30 (Above 0Deg.F) | 4.00 QTS. | — | — |
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More specs & repair guides for your Estate Wagon
1990 Buick Estate Wagon factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
16.0 quarts (15.14 L) — 50/50 mixture of Ethylene Glycol Base Antifreeze and water. GM Specification 1825-M.
Frequently asked questions
What type of oil does a 1990 Buick Estate Wagon take?
The 1990 Buick Estate Wagon takes 5W-30 motor oil (API - SAE 5W-30 (Preferred), 10W-30 (Above 0Deg.F)), per the factory service manual.
How much oil does a 1990 Buick Estate Wagon take?
The 1990 Buick Estate Wagon holds 4.0 quarts with a filter change.
Can I use synthetic oil in my 1990 Buick Estate Wagon?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1990 Buick Estate Wagon. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.