1991 Mazda Navajo Oil Type & Capacity
The 1991 Mazda Navajo 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 |
|---|---|---|---|---|
| LX, Automatic | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 120Deg.F) | 5.00 QTS. | — | — |
| LX, Standard | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 120Deg.F) | 5.00 QTS. | — | — |
| S, Automatic | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 120Deg.F) | 5.00 QTS. | — | — |
| S, Standard | API - SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 120Deg.F) | 5.00 QTS. | — | — |
Buy the right oil
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More specs & repair guides for your Navajo
1991 Mazda Navajo factory service manualAll fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner site AllOEMManuals.com.
Coolant capacity
8.6 quarts (8.13 L) — Ethylene Glycol Antifreeze Coolant
Frequently asked questions
What type of oil does a 1991 Mazda Navajo take?
The 1991 Mazda Navajo takes 5W-30 motor oil (API - SAE 5W-30 (Below -20Deg.F to 35Deg.F), 10W-30 (Below -10Deg.F to Above 120Deg.F)), per the factory service manual.
How much oil does a 1991 Mazda Navajo take?
The 1991 Mazda Navajo holds 5.0 quarts with a filter change.
Can I use synthetic oil in my 1991 Mazda Navajo?
Yes. 5W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 1991 Mazda Navajo. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.