Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2020 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
Engine Lubrication System (2.0L): General Description: Specification
| Lubrication method | Forced lubrication | |||||
| Oil pump | Pump type | Trochoid type | ||||
| Number of teeth | Inner rotor | 11 | ||||
| Outer rotor | 12 | |||||
| Outer rotor diameter x Thickness mm (in) | 77 x 14 (3.03 x 0.55) | |||||
| Performance (Oil temperature 120°C (248°F)) | 600 r/min | Discharge pressure kPa (kg/cm2 , psi) | 35 (0.4, 5.1) | |||
| Discharge rate L (US qt, Imp qt)/min | 7.4 (7.8, 6.5) or more | |||||
| 6, 700 r/min | Discharge pressure kPa (kg/cm2 , psi) | 321 (3.3, 46.6) | ||||
| Discharge rate L (US qt, Imp qt)/min | 60.2 (63.6, 53.0) or more | |||||
| Relief valve working pressure kPa (kg/cm2 , psi) | 700 (7.1, 102) | |||||
| Oil filter(1) | Filter type | Full-flow filter type | ||||
| Filtration area cm2 (sq in) | 900 (139.5) | |||||
| By-pass valve opening pressure kPa (kg/cm2 , psi) | 160 (1.6, 23.2) | |||||
| Outer diameter x Width mm (in) | 80 x 65 (3.15 x 2.55) | |||||
| Installation screw specifications | M 20 x 1.5 | |||||
| Oil pressure switch | Type | Immersed contact point type | ||||
| Operating voltage | 12 V | |||||
| Warning light operating pressure kPa (kg/cm2 , psi) | 14.7 (0.1, 2.1) | |||||
| Proof pressure kPa (kg/cm2 , psi) | 981 (10, 142.2) | |||||
| Engine oil | Total capacity (at overhaul) L (US qt, Imp qt) | 6.0 (6.3, 5.3) | ||||
| When replacing engine oil and oil filter L (US qt, Imp qt) | 5.1 (5.4, 4.5) | |||||
| When replacing engine oil only L (US qt, Imp qt) | 4.9 (5.2, 4.3) | |||||
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Specified oil:
CAUTION:
- Use 5W-30 (synthetic oil).
- It is acceptable to fill an engine with oil of another brand when replacing the oil, but make sure to use the following engine oil specified by Subaru.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.