The 2020 Subaru WRX uses synthetic engine oil with a viscosity of 0W-20.
In more detail, Subaru generally specifies a full-synthetic 0W-20 motor oil for the FA20 engine in the 2020 WRX, with a total capacity of about 5 quarts (4.8 liters) including the filter. The oil should meet API SN or newer and ILSAC GF-5 or newer, and be Subaru-approved or equivalent. Always consult the owner's manual or a dealer for region-specific guidance and any climate-related exceptions.
Oil specifications for the 2020 WRX
Key specifications you should follow when selecting oil for the WRX's FA20 engine:
- Viscosity: 0W-20 synthetic motor oil (recommended for most climates).
- Capacity: About 5 quarts (4.8 L) with filter; fill to the full mark after draining and replacement.
- Certification: Oil should meet API SN or newer and ILSAC GF-5 or newer; Subaru-approved or equivalent is recommended.
Using oil that matches these specs helps maintain performance, fuel economy, and engine longevity for your 2020 WRX.
Additional considerations
Notes on climate and maintenance:
Climate and regional guidance
0W-20 is designed to provide good protection during cold starts and in a wide range of temperatures. In extremely hot climates, check the manual or with Subaru for any temperature-specific recommendations, but 0W-20 remains the default for the FA20 engine in most regions.
Brand and compatibility
Prefer Subaru-approved oil or a reputable alternative that explicitly meets the listed specifications (API SN/RC, ILSAC GF-5 or newer). Avoid oils that do not meet these specs, as they can affect engine performance and warranty coverage.
Summary
For a 2020 WRX, the standard oil is synthetic 0W-20, with a capacity of about 5 quarts (4.8 L) including the filter, and it should meet API SN or newer and ILSAC GF-5 or newer. Always verify the exact requirements in your region's manual or with a Subaru dealer, especially if you drive in extreme conditions.