Subaru Subaru WRX 2008-2014 Fuel System Specifications
Explore the detailed fuel specifications for the 2008-2014 Subaru WRX, including fuel type, octane rating, fuel system details, and fuel economy. Essential for maintenance, performance upgrades, and troubleshooting.
Overview Specifications
This document provides detailed fuel specifications and related information for the 2008-2014 Subaru WRX. It is designed to help owners and enthusiasts understand the fuel requirements, performance, and efficiency of the vehicle. Use the search functionality to quickly locate specific details or navigate through the sections for a comprehensive understanding of the fuel system and its components.
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Key Specifications
Fuel Type
Premium Unleaded
Octane Rating
91 AKI / 95 RON
Fuel Tank Capacity
16.9 gallons
City MPG
18-19 MPG
Highway MPG
25-27 MPG
Available Specifications
Fuel Requirements
This section outlines the fuel type, octane rating, and other requirements for optimal performance of the 2008-2014 Subaru WRX. Adhering to these specifications ensures the engine operates efficiently and avoids potential damage.
Fuel Requirements
This section outlines the fuel type, octane rating, and other requirements for optimal performance of the 2008-2014 Subaru WRX. Adhering to these specifications ensures the engine operates efficiently and avoids potential damage.
Fuel Type and Octane Rating
- Premium unleaded gasoline is required.
- Minimum octane rating of 91 (AKI) or 95 (RON).
- Using lower octane fuel may cause engine knocking.
- Higher octane fuel can improve performance and efficiency.
Fuel Additives
- Avoid using fuel with methanol or ethanol content above 10%.
- Subaru recommends using Top Tier detergent gasoline.
- Additives should not contain metallic compounds.
- Regular use of fuel system cleaners is not necessary but can be beneficial.
Fuel Efficiency
This section provides details on the fuel efficiency of the 2008-2014 Subaru WRX, including EPA estimates and factors that influence mileage. Understanding these metrics can help optimize driving habits for better fuel economy.
Fuel Efficiency
This section provides details on the fuel efficiency of the 2008-2014 Subaru WRX, including EPA estimates and factors that influence mileage. Understanding these metrics can help optimize driving habits for better fuel economy.
EPA Fuel Economy Estimates
- City: 18-19 MPG.
- Highway: 25-27 MPG.
- Combined: 21-22 MPG.
- Actual mileage may vary based on driving conditions.
Factors Affecting Fuel Efficiency
- Aggressive driving reduces fuel economy.
- Proper tire inflation improves mileage.
- Regular maintenance ensures optimal performance.
- Cold weather can decrease fuel efficiency.
Fuel System Components
This section covers the key components of the fuel system in the 2008-2014 Subaru WRX, including the fuel tank, pump, injectors, and filters. Understanding these parts can help diagnose and address fuel-related issues.
Fuel System Components
This section covers the key components of the fuel system in the 2008-2014 Subaru WRX, including the fuel tank, pump, injectors, and filters. Understanding these parts can help diagnose and address fuel-related issues.
Fuel Tank and Pump
- Fuel tank capacity: 16.9 gallons (64 liters).
- Electric fuel pump delivers fuel to the engine.
- Pump is located inside the fuel tank.
- Regular inspection ensures proper function.
Fuel Injectors and Filters
- Direct fuel injection system for precise delivery.
- Fuel filter is integrated into the fuel pump module.
- Injectors should be cleaned periodically.
- Clogged injectors can reduce performance.
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Component Specifications
Overview
- Type
- Gasoline
- Configuration
- Direct injection
- Platform
- Subaru Boxer Engine
- Material
- High-grade steel and aluminum
- Location
- Engine bay, integrated with fuel delivery system
Dimensions
- Fuel Tank Capacity
- 16.9 gallons (64 liters)
- Fuel Line Diameter
- 0.375 inches (9.5 mm)
- Fuel Pump Pressure
- 58 psi (400 kPa)
- Fuel Filter Size
- 2.5 inches x 3.75 inches (63.5 mm x 95.25 mm)
- injector Flow Rate
- 550 cc/min
- Fuel Rail Length
- 18.5 inches (470 mm)
- Fuel Tank Weight Empty
- 12.5 lbs (5.67 kg)
Materials
- Fuel Tank
- High-density polyethylene
- Fuel Lines
- Nitrile rubber with steel braiding
- Fuel Pump
- Stainless steel and plastic composite
- Fuel injectors
- Aluminum body with stainless steel internals
- Fuel Rail
- Forged aluminum
Features
- Fuel Delivery
-
- High-pressure fuel pump
- Direct injection system
- Sequential fuel injection
- Variable fuel pressure control
- Fuel Storage
-
- Molded plastic fuel tank
- Integrated fuel level sensor
- Rollover valve for safety
- Ventless design
- Fuel Management
-
- Electronic fuel control
- Closed-loop fuel system
- Real-time fuel trim adjustment
- Fail-safe fuel delivery mode
- Emissions Control
-
- Evaporative emissions system
- Charcoal canister
- Fuel vapor recovery
- OBD-II compliant
- Performance
-
- High-flow fuel injectors
- Optimized fuel rail design
- Low-pressure loss fuel lines
- Quick-start fuel priming
Safety Features
- Fuel Leak Prevention
-
- Double-walled fuel lines
- Automatic shutoff valve
- Impact-resistant fuel tank
- Fire Prevention
-
- Fuel cut-off inertia switch
- Flame arrestor in fuel tank
- Heat shielding around fuel components
- Overpressure Protection
-
- Pressure relief valve
- Fuel pressure regulator
- Returnless fuel system design
Comfort Features
- Noise Reduction
-
- Dampened fuel pump
- Insulated fuel lines
- Vibration-resistant mounting
- Drivability
-
- Smooth fuel delivery
- Instant throttle response
- Consistent fuel pressure
- Maintenance Access
-
- Easy-access fuel filter
- Serviceable fuel pump
- Quick-connect fuel lines
Accessories
- Performance Upgrades
-
- High-flow fuel pump
- Upgraded fuel injectors
- Adjustable fuel pressure regulator
- Aeromotive fuel rail
- Diagnostic Tools
-
- Fuel pressure tester
- Injector flow tester
- Fuel system scanner
- Leak detection kit
- Maintenance Kits
-
- Fuel filter replacement kit
- Fuel pump service kit
- Fuel injector cleaning kit
- Fuel system treatment
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Inspect fuel lines for leaks
- Replace fuel filter
- Clean fuel injectors
- Check fuel pump pressure
- Inspect fuel tank for damage
- Test fuel system for proper operation
- Maintenance Notes
- Use only recommended fuel grade (91 octane or higher). Avoid ethanol blends above 10%.
Warranty
- Basic Coverage
- Miles: 36,000Years: 3Coverage: Fuel pump and injectors
- Powertrain Coverage
- Miles: 60,000Years: 5Coverage: Fuel delivery system components
- Emissions Coverage
- Miles: 80,000Years: 8Coverage: Evaporative emissions system
- Corrosion Coverage
- Miles: UnlimitedYears: 5Coverage: Fuel tank corrosion
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Injection molding for fuel tank
- CNC machining for fuel rails
- Precision assembly of fuel pump
- Automated testing of fuel injectors
- Quality Control
- Pressure Testing: 100% of fuel systemsLeak Testing: 100% of componentsFlow Testing: Random sampling of injectors
- Sustainability Practices
-
- Recycled materials in fuel tank
- Low-emission manufacturing
- Water-based coatings
- Energy-efficient production
- Production Metrics
- Annual Production: 150,000 unitsDefect Rate: 0.02%Energy Usage: 15 kWh per unit
Service Information for fuel Service
Maintenance and service requirements specific to the fuel system
- Inspect fuel lines and connections
- Replace fuel filter
- Test fuel pump pressure
- Check fuel injector operation
- Inspect fuel tank for damage
Use only OEM or equivalent replacement parts
- Clean fuel injectors
- Inspect fuel pump operation
- Check fuel pressure regulator
- Test evaporative emissions system
- Inspect fuel tank vent system
Specialized tools required for fuel system testing
- Replace fuel pump assembly
- Replace fuel injectors
- Inspect and clean fuel tank
- Replace all fuel lines
- Perform complete fuel system diagnostic
Major service requires fuel system depressurization
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2008-2014 Subaru WRX?
What type of fuel is recommended for the 2008-2014 Subaru WRX?
The 2008-2014 Subaru WRX requires premium unleaded gasoline with an octane rating of 91 or higher. Using lower-octane fuel can lead to engine knocking, reduced performance, and potential long-term damage. The turbocharged engine is designed to optimize performance with higher-octane fuel, ensuring efficient combustion and power output.
Q2 What is the recommended maintenance schedule for the fuel system?
What is the recommended maintenance schedule for the fuel system?
The fuel system maintenance for the 2008-2014 Subaru WRX includes inspecting and replacing the fuel filter every 30,000 miles, checking fuel injectors for clogs or leaks, and ensuring the fuel pump operates correctly. Regular use of fuel system cleaners is recommended to prevent carbon buildup. Always follow the owner's manual for specific intervals and procedures.
Q3 How do I replace the fuel pump in a 2008-2014 Subaru WRX?
How do I replace the fuel pump in a 2008-2014 Subaru WRX?
To replace the fuel pump, first, disconnect the battery and relieve fuel system pressure. Remove the rear seat cushion to access the fuel pump assembly. Disconnect electrical connectors and fuel lines, then unscrew the retaining ring to remove the pump. Install the new pump, reassemble components, and reconnect the battery. Test for leaks before operating the vehicle.
Q4 What should I do if my WRX is experiencing poor fuel economy?
What should I do if my WRX is experiencing poor fuel economy?
Poor fuel economy in the 2008-2014 Subaru WRX can result from clogged fuel injectors, a dirty air filter, or incorrect tire pressure. Check and replace the air filter, ensure tires are inflated to the recommended PSI, and use a fuel injector cleaner. If issues persist, inspect the oxygen sensors and fuel system for malfunctions.
Q5 How can I optimize fuel efficiency and performance in my WRX?
How can I optimize fuel efficiency and performance in my WRX?
To optimize fuel efficiency and performance, use premium fuel, maintain proper tire pressure, and perform regular engine tune-ups. Upgrading to a high-flow air filter and ensuring the turbocharger is functioning correctly can also enhance performance. Avoid aggressive driving and excessive idling to improve fuel economy.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2008-2014 Subaru WRX Service Manual
Coming SoonComprehensive guide covering maintenance, repairs, and technical specifications for the 2008-2014 Subaru WRX.
Subaru Technical Service Bulletin: Fuel System Updates
Coming SoonDetails updates and fixes for fuel system components in the 2008-2014 WRX models.
Subaru WRX Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts and accessories for the 2008-2014 Subaru WRX.
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