1991 Ford Bronco Oil Type & Capacity: 5W-30 (6.0 quarts)
The 1991 Ford Bronco takes 5W-30 motor oil — 6.0 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 6.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 4.9 Y, Automatic | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
| 4.9 Y, Standard, M5OD-R2 | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
| 4.9 Y, Standard, T18 | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
| 5.0 N, Automatic, AOD | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
| 5.0 N, Automatic, E4OD | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
| 5.0 N, Standard | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
| 5.8 H | SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F) | 6.00 QTS. | 5.00 QTS. | — |
More factory specs & repair guides for your Bronco
🛞 1991 Ford Bronco Tire Size & Pressure →🌧️ 1991 Ford Bronco Wiper Blade Sizes →💡 1991 Ford Bronco Light Bulb Sizes →📖 1991 Ford Bronco Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
14.0 quarts (13.24 L) — 50/50 mixture of FORD Premium Cooling System Fluid and water
Frequently asked questions
What type of oil does a 1991 Ford Bronco take?
The 1991 Ford Bronco takes 5W-30 motor oil (SAE 5W-30 Super Premium Engine Oil (Below 0Deg.F), 10W-30 Super Premium Engine Oil (0Deg.F to 100Deg.F), 20W-40/50 Premium Engine Oil (20Deg.F to Above 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1991 Ford Bronco?
The 1991 Ford Bronco oil capacity is 6.0 quarts with a filter change, or 5.0 quarts without changing the filter.
How often should I change the oil in my 1991 Ford Bronco?
Most 1991 Ford Bronco 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 — Ford recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1991 Ford Bronco?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Ford Bronco. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.