2008 Mazda RX-8 Oil Type & Capacity: 5W-20 (3.7 quarts)
The 2008 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 |
|---|---|---|---|---|
| 40th Anniversary Edition | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Grand Touring, 1.3 3 | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Grand Touring, 1.3 N, RC4AEL | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Grand Touring, 1.3 N, SJ6AEL | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Sport, 1.3 3 | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Sport, 1.3 N, RC4AEL | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Sport, 1.3 N, SJ6AEL | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Touring, 1.3 3 | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Touring, 1.3 N, RC4AEL | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
| Touring, 1.3 N, SJ6AEL | API - ILSAC, SAE 5W-20 Engine Oil | 3.70 QTS. | 3.50 QTS. | DO NOT use either synthetic or semi-synthetic motor oil. Otherwise engine starting performance could worsen. |
More factory specs & repair guides for your RX-8
🛞 2008 Mazda RX-8 Tire Size & Pressure →🌧️ 2008 Mazda RX-8 Wiper Blade Sizes →💡 2008 Mazda RX-8 Light Bulb Sizes →📖 2008 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). FL22 type engine coolant concentration is factory adjusted. Use the product as it is without diluting it. Except FL22 type engine coolant: Above 3Deg.F use: 35% Antifreeze solution and 65% demineralized water, above -15Deg.F use: 45% Antifreeze solution and 55% demineralized water, above -40Deg.F use: 55% Antifreeze solution and 45% demineralized water.
Frequently asked questions
What type of oil does a 2008 Mazda RX-8 take?
The 2008 Mazda RX-8 takes 5W-20 motor oil (API - ILSAC, SAE 5W-20 Engine Oil), per the factory service manual.
What is the oil capacity of a 2008 Mazda RX-8?
The 2008 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 2008 Mazda RX-8?
Most 2008 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 2008 Mazda RX-8?
Yes. 5W-20 is widely available as a full synthetic, and synthetic is safe (often recommended) for the 2008 Mazda RX-8. What matters most is matching the factory viscosity and specification, then changing the oil and filter on schedule.