Checked oil specs by engine
2011 Mazda RX 8 oil capacity, type & filter
The 2011 Mazda RX 8 takes 4.6 qt of 5W-20 oil.
Applies to checked engine: 1.3L 2-Cyl.
PRO-TEC PXL57356 is copied into the checkout checklist below. Other listed filters are source-backed alternatives.
Search paths only — confirm your OEM viscosity spec and quantity before checkout.
2011 Mazda RX 8 oil specs: capacity conditions and filter notes
All listed filter part numbers are compatible alternatives for your vehicle. Choose any one brand, then confirm the exact part number at checkout.
With filter means the volume includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.
Retailer fitment tools may use different data. Confirm oil capacity, viscosity, and filter part number before ordering.
Source coverage for the 2011 Mazda RX 8
Supported by Pennzoil OATS, AMSOIL Lookup, Castrol (Olyslager), Valvoline Product Finder, and CarAraC Engine Oil.
Supported by Pennzoil OATS and AMSOIL Lookup.
Supported by K&N Filters, RockAuto, and AMSOIL Lookup.
7 checked source rows for the 2011 Mazda RX 8.
Before ordering for this 2011 Mazda RX 8
- Capacity
- 4.6 qt (Service fill)
- Oil type
- 5W-20
- Interval
- 7,500 mi / 6 mo
- Filter
- PRO-TEC PXL57356
Source check: Last checked 2026-06-26 from Pennzoil OATS, RockAuto, K&N Filters, AMSOIL Lookup, Valvoline Product Finder, CarAraC Engine Oil, and Castrol (Olyslager).
Mazda RX 8 oil specs by year
This table includes checked Mazda RX 8 model years available in our database.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2011 Current page | 4.6 qt | 5W-20 | PRO-TEC PXL57356 |
| 2010 | 4.6 qt | 5W-20 | AMSOIL EA15K13 |
How we verified 2011 Mazda RX 8 oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-26.
This page checked 7 sources for the 2011 Mazda RX 8. The table lists which checked source contributed capacity, oil type, or filter evidence.
We checked leading oil brands and aftermarket filter catalogs so you don't have to.
- Confidence
- Cross-check pending
- Sources checked
- 7
- Last checked
- 2026-06-26
- Capacity: Pennzoil OATS, AMSOIL Lookup, Castrol (Olyslager), Valvoline Product Finder, and CarAraC Engine Oil
- Oil type: Pennzoil OATS and AMSOIL Lookup
- Filter: K&N Filters, RockAuto, and AMSOIL Lookup
- Change interval: Pennzoil OATS and AMSOIL Lookup
| Source | Supports | Checked | Link |
|---|---|---|---|
| Pennzoil OATS | Capacity, Oil type | 2026-06-26 | Visit brand site |
| RockAuto | Filter | 2026-06-26 | Checked source |
| K&N Filters | Filter | 2026-06-26 | Visit brand site |
| AMSOIL Lookup | Capacity, Oil type, Filter | 2026-06-26 | Visit brand site |
| Valvoline Product Finder | Capacity | 2026-06-26 | Checked source |
| CarAraC Engine Oil | Capacity | 2026-06-26 | Checked source |
| Castrol (Olyslager) | Capacity | 2026-06-26 | Visit brand site |
2011 Mazda RX 8 oil FAQ
Is the oil capacity measured with or without the filter?
Capacity condition matters. With filter includes a new filter. Service fill is the typical drain-and-fill amount. Dry fill is for a fresh empty engine only.
Why should I confirm before buying?
Retailer catalogs can update separately. Confirm the exact 2011 Mazda RX 8 selector at checkout before you buy.
Do I also need to match the OEM oil approval?
Yes. Viscosity is only one part of the oil spec. Match the oil approval listed in your owner's manual or on the bottle before checkout.
How often should I change the oil on a 2011 Mazda RX 8?
Castrol's service data indicates a 7,500 mi / 6 mo change interval for the 2011 Mazda RX 8. Always follow your owner's manual and oil-life monitor. Severe service may require a shorter interval.
Do I need a new drain plug gasket?
Replace it when your vehicle uses a serviceable gasket or crush washer. Confirm the gasket size and drain plug torque from the service manual or parts counter.
2011 Mazda RX 8 maintenance checklist
One part checked. Look up the rest while you're here.
Where to buy
These are retailer search paths for your vehicle. The specs above are checked — use the retailer's vehicle selector at checkout to confirm before ordering.
This section may include affiliate or sponsored retailer links. They are purchase paths, not fitment evidence.
Walmart
Compare oil and filter listings for the 2011 Mazda RX 8. Confirm capacity, viscosity, and filter part number before checkout.
Search 2011 Mazda RX 8 oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2011 Mazda RX 8 before checkout to confirm oil capacity, viscosity, and filter fitment.
Search 2011 Mazda RX 8 oil & filter →Amazon
Search Amazon listings for the 2011 Mazda RX 8 and check listing fitment notes against the specs above.
Search 2011 Mazda RX 8 oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2011 Mazda RX 8 and verify oil capacity, viscosity, and filter part number before ordering.
Search 2011 Mazda RX 8 oil & filter →Look up another vehicle
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