Engine Lubrication System (H4SO): General Description: Specification
LUBRICATION METHOD SPECIFICATION CHART
| Lubrication method | Forced lubrication | |||
| Oil pump | Pump type | Trochoid type | ||
| Number of teeth | Inner rotor | 9 | ||
| Outer rotor | 10 | |||
| Outer rotor diameter x thickness | 78 x 10 mm (3.07 x 0.39 in) | |||
| Tip clearance between inner and outer rotor | STANDARD | 0.04 - 0.14 mm (0.0016 - 0.0055 in) | ||
| LIMIT | 0.18 mm (0.0071 in) | |||
| Side clearance between inner rotor and pump case | STANDARD | 0.02 - 0.07 mm (0.0008 - 0.0028 in) | ||
| LIMIT | 0.12 mm (0.0047 in) | |||
| Case clearance between outer rotor and pump case | STANDARD | 0.10 - 0.175 mm (0.0039 - 0.0069 in) | ||
| LIMIT | 0.20 mm (0.0079 in) | |||
| Performance at 80°C (176°F) | 600 rpm | Discharge pressure | 98 kPa (1.0 kgf/cm2 , 14 psi) | |
| Discharge rate | 4.6 l (4.9 US qt, 4.0 Imp qt)/min. | |||
| 5,000 rpm | Discharge pressure | 294 kPa (3.0 kgf/cm2 , 43 psi) | ||
| Discharge rate | 47 l (49.7 US qt, 41.4 Imp qt)/min. | |||
| Relief valve operation pressure | 588 kPa (6.0 kgf/cm2 , 85 psi) | |||
| Oil filter | Type | Full-flow filter type | ||
| Filtration area | Diameter 65 mm (2.56 in) | 470 cm2 (73 sq in) | ||
| Diameter 68 mm (2.68 in) | 800 cm2 (124 sq in) | |||
| By-pass valve opening pressure | 160 kPa (1.63 kgf/cm2 , 23.2 psi) | |||
| Outer diameter x width | Diameter 65 mm (2.56 in) | 65 x 74.4 mm (2.56 x 2.93 in) | ||
| Diameter 68 mm (2.68 in) | 68 x 65 mm (2.68 x 2.56 in) | |||
| Oil filter to engine thread size | M 20 x 1.5 | |||
| Oil pressure switch | Type | Immersed contact point type | ||
| Working voltage - wattage | 12 V - 3.4 W or less | |||
| Warning light activation pressure | 14.7 kPa (0.15 kgf/cm2 , 2.1 psi) | |||
| Proof pressure | 981 kPa (10 kgf/cm2 , 142 psi) | |||
| Engine oil | Total Capacity (at overhaul) | 5.0 l (5.4 US qt, 4.5 Imp qt) | ||
| When replacing engine oil and oil filter | 4.2 l (4.4 US qt, 3.7 Imp qt) | |||
| When replacing engine oil only | 4.0 l (4.2 US qt, 3.5 Imp qt) | |||
Recommended oil:
Those with an API standard SM "Energy Conserving" logo.
ILSAC standard GF-4 "starburst mark" displayed on container top.
CAUTION:
It is acceptable to fill an engine with oil of another brand when replacing the oil, but make sure to use an oil with an API standard and SAE viscosity number specified by Subaru.
NOTE:
If the vehicle is used in regions of high temperatures or in other severe environments, use oil with the viscosities shown below. API standard: SM or SL
SAE Viscosity No.: 30, 40, 10W-50, 20W-40, 20W-50