2003 Mazda Protege5 Oil Type & Capacity: 10W-30 (3.7 quarts)
The 2003 Mazda Protege5 takes 10W-30 motor oil — 3.7 quarts with a filter change, per the factory service manual.
Factory-spec answer
10W-30 — 3.7 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Automatic | API - SAE 10W-30 | 3.70 QTS. | 3.50 QTS. | "SG","SH", "SJ", or "ILSAC" must be on the label. |
| Standard | API - SAE 10W-30 | 3.70 QTS. | 3.50 QTS. | "SG","SH", "SJ", or "ILSAC" must be on the label. |
More factory specs & repair guides for your Protege5
🛞 2003 Mazda Protege5 Tire Size & Pressure →🌧️ 2003 Mazda Protege5 Wiper Blade Sizes →💡 2003 Mazda Protege5 Light Bulb Sizes →📖 2003 Mazda Protege5 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) — MAZDA Premium Engine Coolant. Above 3Deg.F (-16Deg.C) use: 35/65 mixture of antifreeze and water, above -15Deg. F (26Deg.C) use: 45/55 mixture of antifreeze and water, above -40Deg.F (40Deg.C) use: 55/45 mixture of antifreeze and water.
Frequently asked questions
What type of oil does a 2003 Mazda Protege5 take?
The 2003 Mazda Protege5 takes 10W-30 motor oil (API - SAE 10W-30), per the factory service manual.
What is the oil capacity of a 2003 Mazda Protege5?
The 2003 Mazda Protege5 oil capacity is 3.7 quarts with a filter change, or 3.5 quarts without changing the filter.
How often should I change the oil in my 2003 Mazda Protege5?
Most 2003 Mazda Protege5 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 2003 Mazda Protege5?
Yes. 10W-30 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2003 Mazda Protege5. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.