1991 Mazda MX-6 Oil Type & Capacity: 5W-30 (4.33 quarts)
The 1991 Mazda MX-6 takes 5W-30 motor oil — 4.33 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-30 — 4.33 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| DX, Automatic | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 4.33 QTS. | 4.10 QTS. | — |
| DX, Standard | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 4.33 QTS. | 4.10 QTS. | — |
| GT, Automatic | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 4.33 QTS. | 4.10 QTS. | — |
| GT, Standard | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 4.33 QTS. | 4.10 QTS. | — |
| LX, Automatic | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 4.33 QTS. | 4.10 QTS. | — |
| LX, Standard | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F) | 4.33 QTS. | 4.10 QTS. | — |
More factory specs & repair guides for your MX-6
🛞 1991 Mazda MX-6 Tire Size & Pressure →🌧️ 1991 Mazda MX-6 Wiper Blade Sizes →💡 1991 Mazda MX-6 Light Bulb Sizes →📖 1991 Mazda MX-6 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
7.9 quarts (7.47 L) — Ethylene Glycol Antifreeze Coolant
Frequently asked questions
What type of oil does a 1991 Mazda MX-6 take?
The 1991 Mazda MX-6 takes 5W-30 motor oil (API - SAE 5W-30 (Below -20Deg.F to 35Deg.F) 30 (35Deg.F to Above 105Deg.F) 40 (Below 90Deg.F to Above 120Deg.F) 10W-30 (Below -10Deg.F to Above 85Deg.F) 10W-40, 10W-50 (Below -10Deg.F to Above 120Deg.F) 20W-40, 20W-50 (Below 10Deg.F to Above 120Deg.F)), per the factory service manual.
What is the oil capacity of a 1991 Mazda MX-6?
The 1991 Mazda MX-6 oil capacity is 4.33 quarts with a filter change, or 4.1 quarts without changing the filter.
How often should I change the oil in my 1991 Mazda MX-6?
Most 1991 Mazda MX-6 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 — Mazda recommends intervals based on driving conditions, not just mileage.
Can I use synthetic oil in my 1991 Mazda MX-6?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Mazda MX-6. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.