2006 Buick LaCrosse Oil Type & Capacity
The 2006 Buick LaCrosse oil type depends on the engine: the CX takes 5W-30 (4.5 quarts qt with filter); the CXL takes 5W-30 (4.5 quarts qt with filter); the CXS takes 5W-30 (5.5 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- CX: 5W-30, 4.5 quarts with filter
- CXL: 5W-30, 4.5 quarts with filter
- CXS: 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 | 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. |
| CXL — 3.8L Eng | 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. |
| CXS — 3.6L Eng | API - SAE 5W-30 | 5.50 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 LaCrosse
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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 2006 Buick LaCrosse take?
It depends on the engine: CX uses 5W-30; CXL uses 5W-30; CXS uses 5W-30.
What is the oil capacity of a 2006 Buick LaCrosse?
Oil capacity depends on the engine: CX holds 4.5 quarts with filter; CXL holds 4.5 quarts with filter; CXS holds 5.5 quarts with filter.
How often should I change the oil in my 2006 Buick LaCrosse?
Most 2006 Buick LaCrosse 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 2006 Buick LaCrosse?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2006 Buick LaCrosse. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.