What kind of oil does a Subaru STI take?
In general, Subaru STI models require synthetic motor oil, and the exact viscosity depends on the model year and engine code. Across generations, common guidance is 5W-30 for older EJ-based engines and 0W-20 for newer FA-based engines, but the precise specification should come from your owner's manual or Subaru’s official specs for your exact car.
Oil type and viscosity by STI generation
The STI has evolved through two main engine families, each with its own typical oil guidance. Use your vehicle’s engine code and year as the determining factors.
- EJ257-based STI (roughly 2004–2014): Synthetic oil in a viscosity around 5W-30 is commonly recommended, with 5W-40 used by some drivers in very hot climates or for track use. The exact grade and capacity should follow the owner's manual.
- FA20-based STI (roughly 2015–present in many markets): Synthetic oil in a viscosity around 0W-20 is commonly recommended, especially in regions that require maximum fuel economy and low emissions; in hotter climates or for heavy-duty use, 5W-30 may be used, but you should verify the exact specification for your car.
Regardless of generation, the key point is to match the oil to the grade specified in your manual and to use a synthetic oil appropriate for turbocharged engines.
How to confirm the right oil for your car
To ensure you run the oil your STI wants, follow these steps and use them as a quick checklist before an oil change.
- Consult the owner’s manual or Subaru’s official service information for your exact model-year and engine code to confirm the recommended viscosity.
- Choose a high-quality synthetic motor oil that meets the specification listed in the manual and is suitable for turbocharged engines.
- Verify the correct viscosity (for EJ257 engines: commonly around 5W-30; for FA20 engines: commonly around 0W-20, with 5W-30 as an alternative in some markets).
- Use a compatible oil filter and replace any drain-plug gasket as needed.
- Adhere to the oil-change interval recommended for your driving conditions and climate, as outlined in the manual.
If you’re unsure, contact a Subaru dealer or a trusted independent shop to confirm the exact grade for your specific STI.
Summary
The Subaru STI’s oil requirements vary by generation and engine code. Older STI models with the EJ257 engine typically use synthetic 5W-30 (with 5W-40 in extreme conditions), while newer FA20-based STIs commonly use 0W-20 synthetic, with 5W-30 as an alternative in some regions. Always verify the exact viscosity and specification in your owner's manual or through Subaru’s official resources, and use synthetic oil from a reputable brand tailored for turbocharged engines. Regular changes at the interval recommended for your climate and driving conditions will help maintain performance and longevity.
What oil should I use in my STI?
Just use a reputable full synthetic oil. Oem is 5w-30 but can go 5w-40 if you live in warm weather area.
What oil does a 2016 STI take?
Recommended especially for turbo-charged engines, Genuine Subaru Certified 5W-30 Synthetic Motor Oil provides superior protection against oil breakdown for cleaner running and long engine life. 5W-30 synthetic motor oil is required for 2011 and newer turbo-charged Subaru vehicles.
What kind of oil does a 2019 Subaru STI take?
Mobil 1 Full Synthetic Engine Oil 5W-30 5 Quart.
What oil does a 2018 Subaru STI take?
SAE 5W-30 Synthetic oil
