Subaru Subaru Legacy 2015-2019 Fuel System Specifications
Explore the detailed fuel specifications for the 2015-2019 Subaru Legacy, including fuel type, octane rating, tank capacity, and fuel economy. This guide is essential for owners and mechanics to ensure optimal performance and maintenance.
Overview Specifications
This document provides detailed fuel specifications for the 2015-2019 Subaru Legacy. It includes information on fuel types, efficiency, tank capacity, and related technical details. Use this guide to understand the vehicle's fuel requirements and performance metrics. The document is organized into sections for easy navigation, with a quick reference table for key specifications.
How to Use
Use the search function to quickly locate specific fuel-related terms or metrics. Enter keywords like 'fuel efficiency' or 'tank capacity' to find relevant sections.
Navigate through the document using the section titles and subsections. Each major section is divided into detailed subsections for easy access to specific information.
Key Specifications
Fuel Type
87 Octane (Regular)
Fuel Tank Capacity
18.5 gallons
City MPG
25-27 MPG
Highway MPG
34-36 MPG
Combined MPG
29-31 MPG
Available Specifications
Fuel Types and Requirements
This section covers the types of fuel recommended for the 2015-2019 Subaru Legacy, including octane ratings and any specific requirements for optimal performance.
Fuel Types and Requirements
This section covers the types of fuel recommended for the 2015-2019 Subaru Legacy, including octane ratings and any specific requirements for optimal performance.
Recommended Fuel Type
- Regular unleaded gasoline with an octane rating of 87 or higher
- Premium gasoline (91 octane or higher) recommended for improved performance
- Ethanol blends up to 10% (E10) are acceptable
- Avoid using diesel or other incompatible fuels
Fuel Additives
- Use of fuel system cleaners is optional but not required
- Avoid additives containing methanol or silicone
- Subaru-approved additives can enhance performance
- Check the owner's manual for specific recommendations
Fuel Efficiency
This section provides details on the fuel efficiency of the 2015-2019 Subaru Legacy, including EPA-estimated mileage for city, highway, and combined driving.
Fuel Efficiency
This section provides details on the fuel efficiency of the 2015-2019 Subaru Legacy, including EPA-estimated mileage for city, highway, and combined driving.
EPA-Estimated Mileage
- City: 25-27 MPG
- Highway: 34-36 MPG
- Combined: 29-31 MPG
- Actual mileage may vary based on driving conditions
Factors Affecting Efficiency
- Driving habits (e.g., aggressive acceleration reduces efficiency)
- Vehicle load and cargo weight
- Tire pressure and condition
- Environmental factors like temperature and terrain
Fuel Tank and Capacity
This section outlines the fuel tank specifications for the 2015-2019 Subaru Legacy, including capacity and refueling tips.
Fuel Tank and Capacity
This section outlines the fuel tank specifications for the 2015-2019 Subaru Legacy, including capacity and refueling tips.
Fuel Tank Capacity
- 18.5-gallon fuel tank
- Approximate range of 500-600 miles on a full tank
- Low fuel warning light activates with 2-3 gallons remaining
- Refuel as soon as possible after the warning light appears
Refueling Tips
- Turn off the engine before refueling
- Use the correct fuel grade for optimal performance
- Avoid overfilling the tank to prevent spillage
- Ensure the fuel cap is securely tightened after refueling
Search Specifications
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Component Specifications
Overview
- Type
- Gasoline
- Configuration
- Direct Injection
- Platform
- Subaru Global Platform
- Material
- High-strength steel
- Location
- Front-engine, all-wheel drive
Dimensions
- Fuel Tank Capacity
- 18.5 gallons (70 liters)
- Fuel Line Diameter
- 0.375 inches (9.525 mm)
- Fuel Pump Pressure
- 58 psi (400 kPa)
- Fuel Filter Size
- 2.5 inches x 4 inches (63.5 mm x 101.6 mm)
- Fuel injector Flow Rate
- 250 cc/min
- Fuel Rail Length
- 24 inches (609.6 mm)
- Fuel Tank Weight Empty
- 15 lbs (6.8 kg)
Materials
- Fuel Tank
- High-density polyethylene
- Fuel Lines
- Nylon with rubber coating
- Fuel Pump
- Stainless steel and plastic composite
- Fuel injectors
- Aluminum and stainless steel
- Fuel Filter
- Cellulose and resin
Features
- Fuel Delivery
-
- Direct fuel injection
- Sequential multi-port injection
- Variable fuel pressure control
- Returnless fuel system
- Efficiency
-
- Optimized combustion efficiency
- Low friction fuel pump
- Lightweight fuel tank design
- Enhanced fuel atomization
- Emissions
-
- Low evaporative emissions
- Compliant with Euro 6 standards
- Integrated vapor recovery system
- Precise air-fuel ratio control
- Safety
-
- Impact-resistant fuel tank
- Automatic fuel shutoff in collisions
- Leak detection system
- Overpressure relief valve
- Monitoring
-
- Real-time fuel level monitoring
- Fuel consumption tracking
- Diagnostic trouble code storage
- Fuel system health alerts
Safety Features
- Collision Safety
-
- Automatic fuel pump shutoff
- Reinforced fuel tank structure
- Crash sensors for fuel system
- Fire Prevention
-
- Flame arrestor in fuel tank
- Heat-resistant fuel lines
- Overpressure relief valve
- Leak Prevention
-
- Sealed fuel system
- Leak detection sensors
- Double-walled fuel lines
Comfort Features
- Noise Reduction
-
- Quiet fuel pump operation
- Vibration-dampened fuel lines
- Insulated fuel tank
- Convenience
-
- Easy-access fuel filler
- Fuel cap reminder system
- Integrated fuel level display
- Performance
-
- Smooth acceleration
- Consistent fuel delivery
- Quick cold starts
- Maintenance
-
- Long-life fuel filter
- Self-diagnosing fuel system
- Easy fuel pump replacement
Accessories
- Fuel Additives
-
- Fuel system cleaner
- Octane booster
- Fuel stabilizer
- Fuel Caps
-
- Locking fuel cap
- Vented fuel cap
- OEM replacement cap
- Fuel Tools
-
- Fuel pressure tester
- Fuel line disconnect tool
- Fuel injector cleaner
Maintenance
- Service interval
- Every 7,500 miles or 6 months
- Service Items
-
- Inspect fuel lines for leaks
- Replace fuel filter
- Check fuel pump operation
- Test fuel pressure
- Clean fuel injectors
- Maintenance Notes
- Use only recommended fuel grade. Avoid ethanol blends above 10%.
Warranty
- Basic Warranty
- Miles: 36,000Years: 3Coverage: Fuel system components
- Powertrain Warranty
- Miles: 60,000Years: 5Coverage: Fuel pump and injectors
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Fuel system emissions control
- Corrosion Warranty
- Miles: UnlimitedYears: 5Coverage: Fuel tank corrosion
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Injection molding for fuel tank
- CNC machining for fuel rails
- Automated assembly for fuel pump
- Quality Control
- Pressure Testing: All fuel lines and tanksLeak Testing: Complete fuel systemPerformance Testing: Fuel injectors and pump
- Sustainability Practices
-
- Recycled materials in fuel tank
- Low-emission manufacturing
- Energy-efficient production
- Production Metrics
- Annual Production: 500,000 unitsDefect Rate: 0.01%Energy Use: 10 kWh per unit
Service Information for fuel Service
Maintenance and service requirements specific to the fuel system
- Inspect fuel lines and connections
- Check fuel pressure
- Test fuel pump operation
- Inspect fuel tank for damage
- Replace fuel filter if necessary
Use only OEM parts for replacements
- Replace fuel filter
- Clean fuel injectors
- Inspect fuel tank straps
- Check fuel cap seal
- Test fuel system for leaks
Perform fuel system diagnostic scan
- Replace fuel pump
- Replace fuel injectors
- Inspect and clean fuel tank
- Replace all fuel lines
- Perform complete fuel system flush
Major service requires specialized tools
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2015-2019 Subaru Legacy?
What type of fuel is recommended for the 2015-2019 Subaru Legacy?
The 2015-2019 Subaru Legacy is designed to run on regular unleaded gasoline with an octane rating of 87 or higher. Using higher-octane fuel is not required but may improve performance in certain conditions. Avoid using diesel, E85, or any fuel with more than 10% ethanol, as it may damage the engine or void the warranty.
Q2 What is the recommended maintenance schedule for the fuel system?
What is the recommended maintenance schedule for the fuel system?
Subaru recommends inspecting the fuel system every 30,000 miles or 30 months, whichever comes first. This includes checking the fuel lines, fuel filter, and fuel injectors for wear or blockages. Replace the fuel filter every 60,000 miles and use fuel system cleaners periodically to maintain optimal performance. Always follow the owner's manual for specific maintenance intervals.
Q3 How do I replace the fuel filter on a 2015-2019 Subaru Legacy?
How do I replace the fuel filter on a 2015-2019 Subaru Legacy?
To replace the fuel filter, first, locate it near the fuel tank. Disconnect the negative battery terminal for safety. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls. Disconnect the fuel lines and remove the old filter. Install the new filter, reconnect the fuel lines, and secure the battery terminal. Start the engine and check for leaks.
Q4 What should I do if my Subaru Legacy has poor fuel efficiency?
What should I do if my Subaru Legacy has poor fuel efficiency?
Poor fuel efficiency can result from clogged fuel injectors, a dirty air filter, or incorrect tire pressure. Start by checking and replacing the air filter if necessary. Inspect tire pressure and adjust it to the recommended level. Use a fuel system cleaner to remove deposits from injectors. If issues persist, consult a Subaru technician for a diagnostic check.
Q5 How can I optimize fuel performance in my Subaru Legacy?
How can I optimize fuel performance in my Subaru Legacy?
To optimize fuel performance, use high-quality gasoline, maintain proper tire pressure, and avoid excessive idling. Regularly replace air and fuel filters, and ensure the engine is tuned correctly. Driving at moderate speeds and avoiding rapid acceleration can also improve fuel efficiency. Consider using Subaru-approved fuel additives for additional performance benefits.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2015-2019 Subaru Legacy Owner's Manual
Coming SoonComprehensive guide covering vehicle operation, maintenance schedules, and troubleshooting tips for the 2015-2019 Subaru Legacy.
Subaru Technical Service Bulletin: Fuel System Updates
Coming SoonDetails recent updates and fixes for the fuel system in 2015-2019 Subaru Legacy models, including recalls and recommended repairs.
Subaru Legacy Parts and Accessories Catalog
Coming SoonOfficial catalog listing genuine Subaru parts and accessories for the 2015-2019 Legacy, including fuel system components.
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Technical Information
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