2005 Buick Allure Oil Type & Capacity: 5W-30 (5.5 quarts)
The 2005 Buick Allure takes 5W-30 motor oil — 5.5 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 5.5 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| CX — 3.8L Eng | API- SAE 5W-30 | 5.50 QTS. | 4.00 QTS. | GM Standard GM6094M and displays the American Petroleum Institute Certified for Gasoline Engines starburst symbol. |
| CXL — 3.8L Eng | API- SAE 5W-30 | 5.50 QTS. | 4.00 QTS. | GM Standard GM6094M and displays the American Petroleum Institute Certified for Gasoline Engines starburst symbol. |
| CXS — 3.6L Eng | API- SAE 5W-30 | 5.50 QTS. | 5.20 QTS. | GM Standard GM6094M and displays the American Petroleum Institute Certified for Gasoline Engines starburst symbol. |
More factory specs & repair guides for your Allure
🛞 2005 Buick Allure Tire Size & Pressure →🌧️ 2005 Buick Allure Wiper Blade Sizes →💡 2005 Buick Allure Light Bulb Sizes →📖 2005 Buick Allure 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 2005 Buick Allure take?
The 2005 Buick Allure takes 5W-30 motor oil (API- SAE 5W-30), per the factory service manual.
What is the oil capacity of a 2005 Buick Allure?
The 2005 Buick Allure oil capacity is 5.5 quarts with a filter change, or 4.0 quarts without changing the filter.
How often should I change the oil in my 2005 Buick Allure?
Most 2005 Buick Allure 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 2005 Buick Allure?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2005 Buick Allure. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.