Engine Lubrication System (H4DO): 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 12 (3.03 x 0.47) | |||
| Performance (Oil temperature 120°C (248°F)) | 600 rpm | Discharge pressure | kPa (kgf/cm2 , psi) | 30 (0.3, 4.3) | |
| Discharge rate | L (US qt, Imp qt)/min. | 6 (6.3, 5.3) or more | |||
| 6, 000 rpm | Discharge pressure | kPa (kgf/cm2 , psi) | 260 (2.7, 37.7) | ||
| Discharge rate | L (US qt, Imp qt)/min. | 47 (49.7, 41.4) or more | |||
| Relief valve working pressure (2-step relief) | 1st opening pressure | kPa (kgf/cm2 , psi) | 150 (1.5, 21.7) | ||
| Main opening pressure | kPa (kgf/cm2 , psi) | 570 (5.8, 82.6) | |||
| Oil filter | Filter type | Full-flow filter type | |||
| Filtration area | cm2 (sq in) | 867 (134.3) | |||
| By-pass valve opening pressure | kPa (kgf/cm2 , psi) | 160 (1.6, 23.2) | |||
| Outer diameter x width | mm (in) | 67.4 x 87.1 (2.65 x 3.43) | |||
| 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 (kgf/cm2 , psi) | 14.7 (0.1, 2.1) | |||
| Proof pressure | kPa (kgf/cm2 , psi) | 981 (10, 142.2) or more | |||
| Engine oil | Total capacity (at overhaul) | L (US qt, Imp qt) | 5.7 (6.0, 5.0) | ||
| When replacing engine oil and oil filter | L (US qt, Imp qt) | 4.8 (5.1, 4.2) | |||
| When replacing engine oil only | L (US qt, Imp qt) | 4.6 (4.9, 4.0) | |||
Specified oil:
CAUTION:
- Use 0W-20 (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.
| Engine oil standard | SAE viscosity No. | ||
|---|---|---|---|
|
Those with the API standard SM "Energy Conserving" or SN "Resource Conserving" logo. |
or |
Those with the ILSAC standard GF-4 or GF-5 "starburst mark" displayed on top of the container. |
0W-20 (synthetic oil) |
NOTE:
The proper viscosity oil helps the engine maintain its ideal temperature, and cranking speed increased by reducing viscosity friction in hot condition.