1999 Oldsmobile Silhouette Oil Type & Capacity: 5W-30 (4.5 quarts)
The 1999 Oldsmobile Silhouette takes 5W-30 motor oil — 4.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| GL | API - SAE 5W-30 | 4.50 QTS. | — | — |
| GLS | API - SAE 5W-30 | 4.50 QTS. | — | — |
| GS | API - SAE 5W-30 | 4.50 QTS. | — | — |
| Premiere Edition | API - SAE 5W-30 | 4.50 QTS. | — | — |
More factory specs & repair guides for your Silhouette
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Coolant capacity
9.6 quarts (9.08 L) — 50/50 mixture of DEX-COOL and clean, drinkable water. Orange in color.
Frequently asked questions
What type of oil does a 1999 Oldsmobile Silhouette take?
The 1999 Oldsmobile Silhouette takes 5W-30 motor oil (API - SAE 5W-30), per the factory service manual.
What is the oil capacity of a 1999 Oldsmobile Silhouette?
The 1999 Oldsmobile Silhouette oil capacity is 4.5 quarts with a filter change.
How often should I change the oil in my 1999 Oldsmobile Silhouette?
Most 1999 Oldsmobile Silhouette owners follow a 5,000–7,500 mile interval with conventional oil, or up to 10,000 miles with full synthetic. Always check the oil life monitor if equipped, and consult your owner's manual — Oldsmobile recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1999 Oldsmobile Silhouette?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1999 Oldsmobile Silhouette. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.