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2021 Subaru WRXOil Type & Capacity
OEM spec from the factory service manual for the Base variant.
Quick Answer
Oil Type
API SN or SM, ILSAC GF-5 or GF-4 SAE 5W-30 Synthetic Oil Specified
Capacity (w/ Filter)
5.40 QTS.
5.11 L
Variant
Base
Note: If 5W-30 synthetic oil is not available, 5W-40 conventional oil may be used if replenishment is needed but should be changed to 5W-30 synthetic oil at the next oil change.
Source: Factory service manual — 2021 Subaru WRX Base. View full manual section →
What You'll Need
Frequently Asked Questions
- What type of oil does a 2021 Subaru WRX take?
- The 2021 Subaru WRX requires API SN or SM, ILSAC GF-5 or GF-4 SAE 5W-30 Synthetic Oil Specified. The exact spec may vary slightly by engine variant — this page shows the OEM recommendation for the Base configuration.
- How much oil does a 2021 Subaru WRX need?
- The 2021 Subaru WRX takes 5.40 QTS. (5.11 L) of engine oil with the filter replaced.
- Can I use synthetic oil in my 2021 Subaru WRX?
- Yes — synthetic oil that meets the API SN or SM, ILSAC GF-5 or GF-4 SAE 5W-30 Synthetic Oil Specified specification is acceptable and often preferred for better protection and longer change intervals.
- What happens if I use the wrong oil in my 2021 Subaru WRX?
- Using oil that does not meet the API SN or SM, ILSAC GF-5 or GF-4 SAE 5W-30 Synthetic Oil Specified specification can reduce engine protection, increase wear, and potentially void warranty coverage. Always use oil that meets the OEM spec.