2004 Buick Rainier Oil Type & Capacity
The 2004 Buick Rainier oil type depends on the engine: the 4.2 S, AWD takes 5W-30 (7.0 quarts qt with filter); the 4.2 S, RWD takes 5W-30 (7.0 quarts qt with filter); the 5.3 P, AWD takes 5W-30 (6.0 quarts qt with filter); the 5.3 P, RWD takes 5W-30 (6.0 quarts qt with filter), per the factory service manual.
Factory-spec answer
It depends on the engine:
- 4.2 S, AWD: 5W-30, 7.0 quarts with filter
- 4.2 S, RWD: 5W-30, 7.0 quarts with filter
- 5.3 P, AWD: 5W-30, 6.0 quarts with filter
- 5.3 P, RWD: 5W-30, 6.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 4.2 S, AWD — 4.2L Eng | API - SAE 5W-30 | 7.00 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. |
| 4.2 S, RWD — 4.2L Eng | API - SAE 5W-30 | 7.00 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. |
| 5.3 P, AWD — 5.3L Eng | API - SAE 5W-30 | 6.00 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. |
| 5.3 P, RWD — 5.3L Eng | API - SAE 5W-30 | 6.00 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. |
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Buy the right oil & filter for your Rainier
🛒 Buy 5W-30 Full Synthetic Oil (7.0 quarts needed) on Amazon💡 Capacity Note: Your 2004 Buick Rainier holds 7.0 quarts with filter. Since standard jugs are 5 quarts, be sure to pick up extra 1-quart bottles or a 2-pack to reach the full mark on the dipstick.
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More factory specs & repair guides for your Rainier
🛞 2004 Buick Rainier Tire Size & Pressure →🌧️ 2004 Buick Rainier Wiper Blade Sizes →💡 2004 Buick Rainier Light Bulb Sizes →📖 2004 Buick Rainier Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
13.9 quarts (13.15 L) — 50/50 mixture of DEX-COOL and clean drinkable water
Frequently asked questions
What type of oil does a 2004 Buick Rainier take?
It depends on the engine: 4.2 S, AWD uses 5W-30; 4.2 S, RWD uses 5W-30; 5.3 P, AWD uses 5W-30; 5.3 P, RWD uses 5W-30.
What is the oil capacity of a 2004 Buick Rainier?
Oil capacity depends on the engine: 4.2 S, AWD holds 7.0 quarts with filter; 4.2 S, RWD holds 7.0 quarts with filter; 5.3 P, AWD holds 6.0 quarts with filter; 5.3 P, RWD holds 6.0 quarts with filter.
How often should I change the oil in my 2004 Buick Rainier?
Most 2004 Buick Rainier 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 Rainier?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2004 Buick Rainier. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.