Checked oil specs by engine
2021 Acura ILX oil capacity, type & filter
The 2021 Acura ILX takes 4.7 qt of 0W-20 oil.
Applies to checked engine: 2.4L 4-Cyl.
PG4612 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.
2021 Acura ILX 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 2021 Acura ILX
Supported by Pennzoil OATS and Castrol (Olyslager).
Supported by Pennzoil OATS and Castrol (Olyslager).
Supported by K&N Filters and RockAuto.
4 checked source rows for the 2021 Acura ILX.
Before ordering for this 2021 Acura ILX
- Capacity
- 4.7 qt (Service fill)
- Oil type
- 0W-20
- Interval
- 12 mo
- Filter
- PG4612
Source check: Last checked 2026-06-23 from Pennzoil OATS, RockAuto, K&N Filters, and Castrol (Olyslager).
Acura ILX oil specs by year
This table includes checked Acura ILX model years available in our database.
| Year | Capacity | Oil type | Filter |
|---|---|---|---|
| 2022 | 4.6 qt | 0W-20 | PG4612 |
| 2021 Current page | 4.7 qt | 0W-20 | PG4612 |
| 2020 | 4.6 qt | 0W-20 | AMSOIL EA15K13 |
| 2019 | 4.6 qt | 0W-20 | AMSOIL EA15K13 |
| 2018 | 4.6 qt | 0W-20 | AMSOIL EA15K13 |
| 2017 | 4.6 qt | 0W-20 | PG4612 |
| 2016 | 4.6 qt | 0W-20 | AMSOIL EA15K13 |
| 2015 | 4.4 qt (multiple engines) | 0W-20 | CHAMP / LUBER-FINER PH2867 |
| 2014 | 3.8 qt (multiple engines) | 0W-20 | AMSOIL EA15K13 |
| 2013 | 3.8 qt (multiple engines) | 0W-20 | AMSOIL EA15K13 |
How we verified 2021 Acura ILX oil data
How we verify fitmentChecked fitment data. Last checked: 2026-06-23.
This page checked 4 sources for the 2021 Acura ILX. 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
- Verified fit
- Sources checked
- 4
- Last checked
- 2026-06-23
- Capacity: Pennzoil OATS and Castrol (Olyslager)
- Oil type: Pennzoil OATS and Castrol (Olyslager)
- Filter: K&N Filters and RockAuto
- Change interval: Pennzoil OATS and Castrol (Olyslager)
| Source | Supports | Checked | Link |
|---|---|---|---|
| Pennzoil OATS | Capacity, Oil type | 2026-06-23 | Visit brand site |
| RockAuto | Filter | 2026-06-23 | Checked source |
| K&N Filters | Filter | 2026-06-23 | Visit brand site |
| Castrol (Olyslager) | Capacity, Oil type | 2026-06-23 | Visit brand site |
2021 Acura ILX 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 2021 Acura ILX 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 2021 Acura ILX?
Castrol's service data indicates a 12 mo change interval for the 2021 Acura ILX. 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.
2021 Acura ILX maintenance checklist
One part checked. Look up the rest while you're here.
- Cabin air filter 2021 Acura ILX cabin filter part numbers
- Engine air filter 2021 Acura ILX engine filter part numbers
- Wiper blade size 2021 Acura ILX driver & passenger blade sizes
- Oil type & capacity 0W-20 · 4.7 qt Checked
Where to buy
These are retailer search paths for your vehicle's oil and filter specs. Verify final fitment at checkout.
This section may include affiliate or sponsored retailer links. They are purchase paths, not fitment evidence.
Walmart
Compare oil and filter listings for the 2021 Acura ILX. Confirm capacity, viscosity, and filter part number before checkout.
Search 2021 Acura ILX oil & filter →AutoZone
Use AutoZone's vehicle selector for the 2021 Acura ILX before checkout to confirm oil capacity, viscosity, and filter fitment.
Search 2021 Acura ILX oil & filter →Amazon
Search Amazon listings for the 2021 Acura ILX and check listing fitment notes against the specs above.
Search 2021 Acura ILX oil & filter →O'Reilly
Open O'Reilly's fitment search for the 2021 Acura ILX and verify oil capacity, viscosity, and filter part number before ordering.
Search 2021 Acura ILX oil & filter →Look up another vehicle
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