1991 Jeep Grand Wagoneer Oil Type & Capacity: 5W-30 (5.0 quarts)
The 1991 Jeep Grand Wagoneer takes 5W-30 motor oil — 5.0 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 5.0 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| 36RH | API - SAE 5W-30 (-20Deg.F to 60Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 5.00 QTS. | 4.00 QTS. | — |
| A727 | API - SAE 5W-30 (-20Deg.F to 60Deg.F), 10W-30 (0Deg.F to Above 100Deg.F) | 5.00 QTS. | 4.00 QTS. | — |
More factory specs & repair guides for your Grand Wagoneer
🛞 1991 Jeep Grand Wagoneer Tire Size & Pressure →🌧️ 1991 Jeep Grand Wagoneer Wiper Blade Sizes →💡 1991 Jeep Grand Wagoneer Light Bulb Sizes →📖 1991 Jeep Grand Wagoneer Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
13.0 quarts (12.3 L) — 50/50 mixture of All Season Coolant and water
Frequently asked questions
What type of oil does a 1991 Jeep Grand Wagoneer take?
The 1991 Jeep Grand Wagoneer takes 5W-30 motor oil (API - SAE 5W-30 (-20Deg.F to 60Deg.F), 10W-30 (0Deg.F to Above 100Deg.F)), per the factory service manual.
What is the oil capacity of a 1991 Jeep Grand Wagoneer?
The 1991 Jeep Grand Wagoneer oil capacity is 5.0 quarts with a filter change, or 4.0 quarts without changing the filter.
How often should I change the oil in my 1991 Jeep Grand Wagoneer?
Most 1991 Jeep Grand Wagoneer 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 — Jeep recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1991 Jeep Grand Wagoneer?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Jeep Grand Wagoneer. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.