Subaru FA20 Engine Specifications
The Subaru FA20 engine is a notable powerplant that has gained recognition for its performance and efficiency. It is a 2.0-liter flat-four engine that features a horizontally opposed design, which is a hallmark of Subaru engineering. Below are the detailed specifications of the FA20 engine.
| Specification | Details |
|---|---|
| Engine Type | 4-cylinder, 4-stroke, horizontally opposed (flat-four) |
| Displacement | 2.0 liters (1998 cc) |
| Compression Ratio | 12.5:1 |
| Max Power Output | 148 hp (110 kW) at 6,200 rpm |
| Max Torque | 145 lb-ft (196 Nm) at 4,200 rpm |
| Fuel System | Direct fuel injection |
| Fuel Type | Premium unleaded (91 octane or higher) |
| Turbocharged | Available in some models (e.g., Subaru BRZ) |
| Valvetrain | DOHC with Dual AVCS (Active Valve Control System) |
| Weight | Approximately 330 lbs (150 kg) |
Engine Configuration
The FA20 engine’s unique configuration plays a significant role in its performance characteristics. The horizontally opposed layout allows for a lower center of gravity, which enhances vehicle stability and handling. This design also contributes to a smoother operation, reducing vibrations compared to traditional inline engines.
Key Features of the FA20 Engine Configuration
- Flat-Four Design: The engine features a 180-degree layout, which helps distribute weight evenly across the chassis.
- Direct Injection: This technology improves fuel efficiency and power output by delivering fuel directly into the combustion chamber.
- Dual AVCS: The Active Valve Control System optimizes valve timing for improved performance across various RPM ranges.
- Turbocharged Option: Some variants of the FA20 come with a turbocharger, enhancing power output significantly.
Engine Oil Specifications
Proper maintenance of the FA20 engine includes using the right engine oil. The choice of oil can significantly impact engine performance and longevity.
Recommended Engine Oil
- Viscosity: 0W-20 or 5W-30
- API Rating: SN or higher
- Oil Type: Synthetic oil is recommended for optimal performance.
Oil Capacity
The FA20 engine has an oil capacity of approximately 5.5 quarts (5.2 liters) when equipped with a filter change.
Service Intervals
Regular maintenance is crucial for the FA20 engine to ensure it operates efficiently and reliably. Below are the recommended service intervals.
Oil Change Intervals
- Every 6,000 miles (9,600 km): For normal driving conditions.
- Every 3,000 miles (4,800 km): For severe driving conditions, such as frequent short trips, towing, or driving in extreme temperatures.
Other Maintenance Intervals
- Air Filter Replacement: Every 15,000 miles (24,000 km) or as needed.
- Fuel Filter Replacement: Every 30,000 miles (48,000 km).
- Spark Plug Replacement: Every 60,000 miles (96,000 km).
- Coolant Replacement: Every 60,000 miles (96,000 km).
Conclusion
The Subaru FA20 engine is a well-engineered powerplant that combines performance, efficiency, and reliability. With its unique flat-four configuration, advanced fuel injection system, and proper maintenance practices, it has become a popular choice among enthusiasts and everyday drivers alike. By adhering to the recommended engine oil specifications and service intervals, owners can ensure their FA20 engine remains in excellent condition for years to come.
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