1991 BMW 325iX Oil Type & Capacity: 5W-30 (4.46 quarts)
The 1991 BMW 325iX takes 5W-30 motor oil — 4.46 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.46 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 2D Sedan, Automatic — 2.5L Eng | SAE 5W-30 Synthetic Engine Oil may be used, but it is not required. | — | 4.20 QTS. | Mineral based oil maybe used on pre-1999 models. For reliable engine performance, mineral based engine oil viscosity must be matched to the following temperature ranges, which the vehicle will be operated: -40Deg.F to about 15Deg.F (SAE 5W-20); -40 Deg.F to about 25Deg. F (SAE 5W-30); -30Deg. F to about 40Deg F (SAE 10W-30); -30Deg. F to about 60Deg. F (SAE 10W-40); 0Deg. to about 105Deg. F (SAE 15W-50); 15Deg. F to above 120Deg. F (SAE 20W-50). |
| 2D Sedan, Standard — 2.5L Eng | SAE 5W-30 Synthetic Engine Oil may be used, but it is not required. | — | 4.20 QTS. | Mineral based oil maybe used on pre-1999 models. For reliable engine performance, mineral based engine oil viscosity must be matched to the following temperature ranges, which the vehicle will be operated: -40Deg.F to about 15Deg.F (SAE 5W-20); -40 Deg.F to about 25Deg. F (SAE 5W-30); -30Deg. F to about 40Deg F (SAE 10W-30); -30Deg. F to about 60Deg. F (SAE 10W-40); 0Deg. to about 105Deg. F (SAE 15W-50); 15Deg. F to above 120Deg. F (SAE 20W-50). |
| 4D Sedan, Automatic — 2.5L Eng | SAE 5W-30 Synthetic Engine Oil may be used, but it is not required. | — | 4.20 QTS. | Mineral based oil maybe used on pre-1999 models. For reliable engine performance, mineral based engine oil viscosity must be matched to the following temperature ranges, which the vehicle will be operated: -40Deg.F to about 15Deg.F (SAE 5W-20); -40 Deg.F to about 25Deg. F (SAE 5W-30); -30Deg. F to about 40Deg F (SAE 10W-30); -30Deg. F to about 60Deg. F (SAE 10W-40); 0Deg. to about 105Deg. F (SAE 15W-50); 15Deg. F to above 120Deg. F (SAE 20W-50). |
| 4D Sedan, Standard — 2.5L Eng | SAE 5W-30 Synthetic Engine Oil may be used, but it is not required. | — | 4.20 QTS. | Mineral based oil maybe used on pre-1999 models. For reliable engine performance, mineral based engine oil viscosity must be matched to the following temperature ranges, which the vehicle will be operated: -40Deg.F to about 15Deg.F (SAE 5W-20); -40 Deg.F to about 25Deg. F (SAE 5W-30); -30Deg. F to about 40Deg F (SAE 10W-30); -30Deg. F to about 60Deg. F (SAE 10W-40); 0Deg. to about 105Deg. F (SAE 15W-50); 15Deg. F to above 120Deg. F (SAE 20W-50). |
Complete Oil Change Bundle for 1991 BMW 325iX
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More factory specs & repair guides for your 325iX
🛞 1991 BMW 325iX Tire Size & Pressure →🌧️ 1991 BMW 325iX Wiper Blade Sizes →💡 1991 BMW 325iX Light Bulb Sizes →📖 1991 BMW 325iX Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
11.0 quarts (10.4 L) — Ethylene Glycol Antifreeze. Use only reputable brand Ethylene Glycol Antifreeze w/corrosion inhibitors that are nitrite and amino-free and compatible w/aluminum radiators.
Frequently asked questions
What type of oil does a 1991 BMW 325iX take?
The 1991 BMW 325iX takes 5W-30 motor oil (SAE 5W-30 Synthetic Engine Oil may be used, but it is not required.), per the factory service manual.
What is the oil capacity of a 1991 BMW 325iX?
The 1991 BMW 325iX oil capacity is 4.46 quarts with a filter change, or 4.2 quarts without changing the filter.
How often should I change the oil in my 1991 BMW 325iX?
Most 1991 BMW 325iX 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 — BMW recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1991 BMW 325iX?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 BMW 325iX. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.