1999 Oldsmobile Eighty-Eight Oil Type & Capacity: 10W-30 (4.5 quarts)
The 1999 Oldsmobile Eighty-Eight takes 10W-30 motor oil — 4.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
10W-30 — 4.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 50th Anniversary Edition | API - SAE 10W-30 | 4.50 QTS. | 4.00 QTS. | — |
| Base | API - SAE 10W-30 | 4.50 QTS. | 4.00 QTS. | — |
| LS | API - SAE 10W-30 | 4.50 QTS. | 4.00 QTS. | — |
More factory specs & repair guides for your Eighty-Eight
🛞 1999 Oldsmobile Eighty-Eight Tire Size & Pressure →🌧️ 1999 Oldsmobile Eighty-Eight Wiper Blade Sizes →💡 1999 Oldsmobile Eighty-Eight Light Bulb Sizes →📖 1999 Oldsmobile Eighty-Eight Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
13.0 quarts (12.3 L) — 50/50 mixture of DEX-COOL and clean, drinkable water
Frequently asked questions
What type of oil does a 1999 Oldsmobile Eighty-Eight take?
The 1999 Oldsmobile Eighty-Eight takes 10W-30 motor oil (API - SAE 10W-30), per the factory service manual.
What is the oil capacity of a 1999 Oldsmobile Eighty-Eight?
The 1999 Oldsmobile Eighty-Eight oil capacity is 4.5 quarts with a filter change, or 4.0 quarts without changing the filter.
How often should I change the oil in my 1999 Oldsmobile Eighty-Eight?
Most 1999 Oldsmobile Eighty-Eight 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 Eighty-Eight?
Yes. 10W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1999 Oldsmobile Eighty-Eight. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.