2004 Buick Regal Oil Type & Capacity: 5W-30 (4.5 quarts)
The 2004 Buick Regal 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 |
|---|---|---|---|---|
| GS | API - SAE 5W-30 | 4.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
| LS | API - SAE 5W-30 | 4.50 QTS. | — | Use oil that meets GM Standard GM6094M. For areas of extreme cold, where temperatures fall below -20Deg.F (-29Deg.C), it is recommended a SAE 5W-30 synthetic oil or a SAE 10W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures. |
More factory specs & repair guides for your Regal
🛞 2004 Buick Regal Tire Size & Pressure →🌧️ 2004 Buick Regal Wiper Blade Sizes →💡 2004 Buick Regal Light Bulb Sizes →📖 2004 Buick Regal Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.7 quarts (11.07 L) — 50/50 mixture of DEX-COOL and clean drinkable water
Frequently asked questions
What type of oil does a 2004 Buick Regal take?
The 2004 Buick Regal takes 5W-30 motor oil (API - SAE 5W-30), per the factory service manual.
What is the oil capacity of a 2004 Buick Regal?
The 2004 Buick Regal oil capacity is 4.5 quarts with a filter change.
How often should I change the oil in my 2004 Buick Regal?
Most 2004 Buick Regal 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 — Buick recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 2004 Buick Regal?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2004 Buick Regal. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.