2005 Mazda RX-8 Oil Type & Capacity: 5W-20 (3.7 quarts)
The 2005 Mazda RX-8 takes 5W-20 motor oil — 3.7 quarts with a filter change, per the factory service manual.
Factory-spec answer
5W-20 — 3.7 quarts with filter
Oil capacity by engine
| Engine | Oil Type (viscosity) | Capacity w/ Filter | Capacity w/o Filter | Notes |
|---|---|---|---|---|
| Shinka, 1.3 3 | API - SL or ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | — |
| Shinka, 1.3 N | API - SL or ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | — |
| Sport, 1.3 3 | API - SL or ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | — |
| Sport, 1.3 N | API - SL or ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | — |
More factory specs & repair guides for your RX-8
🛞 2005 Mazda RX-8 Tire Size & Pressure →🌧️ 2005 Mazda RX-8 Wiper Blade Sizes →💡 2005 Mazda RX-8 Light Bulb Sizes →📖 2005 Mazda RX-8 Factory Service Manual →All fluid capacities (transmission, coolant, brakes)Powered by factory manual data from our partner network AllOEMManuals.com.
Coolant capacity
10.4 quarts (9.84 L) — MAZDA Premium Engine Coolant
Frequently asked questions
What type of oil does a 2005 Mazda RX-8 take?
The 2005 Mazda RX-8 takes 5W-20 motor oil (API - SL or ILSAC, SAE 5W-20 Engine Oil), per the factory service manual.
What is the oil capacity of a 2005 Mazda RX-8?
The 2005 Mazda RX-8 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 2005 Mazda RX-8?
Most 2005 Mazda RX-8 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 2005 Mazda RX-8?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2005 Mazda RX-8. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.