1998 Oldsmobile Cutlass Oil Type & Capacity
The 1998 Oldsmobile Cutlass 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 |
|---|---|---|---|---|
| Base | API - SAE 5W-30 | 4.50 QTS. | — | — |
| GL | API - SAE 5W-30 | 4.50 QTS. | — | — |
| GLS | API - SAE 5W-30 | 4.50 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Cutlass
1998 Oldsmobile Cutlass factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
13.6 quarts (12.87 L) — 50/50 mixture of DEX-COOL and clean water (preferably distilled)
Frequently asked questions
What type of oil does a 1998 Oldsmobile Cutlass take?
The 1998 Oldsmobile Cutlass takes 5W-30 motor oil (API - SAE 5W-30), per the factory service manual.
How much oil does a 1998 Oldsmobile Cutlass take?
The 1998 Oldsmobile Cutlass holds 4.5 quarts with a filter change.
Can I use synthetic oil in my 1998 Oldsmobile Cutlass?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1998 Oldsmobile Cutlass. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.