Infiniti FX45 2003-2008 Fuel System Specifications
Explore the comprehensive fuel specifications for the 2003-2008 Infiniti FX45, including fuel type, tank capacity, economy, and emission standards. Essential for maintenance, performance, and compliance.
Overview Specifications
This document provides detailed fuel specifications for the 2003-2008 Infiniti FX45. It includes information on fuel type, fuel economy, tank capacity, and other 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 quick reference tables for key specifications.
How to Use
Use the search function to quickly locate specific fuel-related terms or metrics. Enter keywords like 'fuel economy' or 'tank capacity' to find relevant sections.
Navigate through the document using the section titles. Each section is divided into subsections with detailed points. Use the quick reference table for a summary of key specifications.
Key Specifications
Fuel Type
Premium Unleaded
Fuel Tank Capacity
23.8 gallons
City MPG
14 MPG
Highway MPG
19 MPG
Combined MPG
16 MPG
Available Specifications
Fuel Type and Requirements
This section covers the type of fuel recommended for the 2003-2008 Infiniti FX45, including octane ratings and any special requirements. It also discusses the impact of using alternative fuels or additives.
Fuel Type and Requirements
This section covers the type of fuel recommended for the 2003-2008 Infiniti FX45, including octane ratings and any special requirements. It also discusses the impact of using alternative fuels or additives.
Recommended Fuel Type
- Premium unleaded gasoline with an octane rating of 91 or higher
- Using lower octane fuel may reduce performance and fuel efficiency
- Avoid using diesel or ethanol blends above 10%
- Additives are not required but can be used for maintenance
Alternative Fuel Options
- E85 ethanol is not compatible
- Biodiesel is not supported
- Natural gas or propane conversions are not recommended
- Hybrid or electric modifications are not factory-supported
Fuel Economy
This section provides detailed information on the fuel efficiency of the 2003-2008 Infiniti FX45, including city, highway, and combined MPG ratings. It also discusses factors that may affect fuel economy.
Fuel Economy
This section provides detailed information on the fuel efficiency of the 2003-2008 Infiniti FX45, including city, highway, and combined MPG ratings. It also discusses factors that may affect fuel economy.
MPG Ratings
- City: 14 MPG
- Highway: 19 MPG
- Combined: 16 MPG
- Actual mileage may vary based on driving conditions
Factors Affecting Fuel Economy
- Aggressive driving reduces fuel efficiency
- Cold weather can lower MPG by up to 20%
- Proper tire inflation improves fuel economy
- Regular maintenance ensures optimal performance
Fuel Tank and Capacity
This section details the fuel tank specifications for the 2003-2008 Infiniti FX45, including capacity, materials, and refueling tips.
Fuel Tank and Capacity
This section details the fuel tank specifications for the 2003-2008 Infiniti FX45, including capacity, materials, and refueling tips.
Fuel Tank Specifications
- Fuel tank capacity: 23.8 gallons
- Material: High-density polyethylene
- Includes a fuel vapor recovery system
- Refueling time: Approximately 5-7 minutes
Refueling Tips
- Always turn off the engine before refueling
- Use the recommended fuel grade for best results
- Avoid overfilling the tank to prevent spillage
- Check the fuel cap for proper sealing after refueling
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Component Specifications
Overview
- Type
- Gasoline
- Octane Rating
- 91 (recommended)
- Fuel System
- Sequential Multi-Port Fuel Injection
- Tank Capacity
- 23.8 gallons (90 liters)
- Fuel Economy
- 15 mpg city / 20 mpg highway (estimated)
Dimensions
- Tank Length
- 42.5 inches (108 cm)
- Tank Width
- 28.3 inches (72 cm)
- Tank Height
- 12.6 inches (32 cm)
- Filler Neck Diameter
- 1.5 inches (3.8 cm)
- Fuel Line Diameter
- 0.5 inches (1.27 cm)
- Fuel Pump Output
- 45 psi (310 kPa)
- Fuel Filter Size
- 2.5 inches x 1.5 inches (6.35 cm x 3.81 cm)
Materials
- Tank Material
- High-density polyethylene
- Fuel Lines
- Reinforced synthetic rubber
- Filler Neck
- Stainless steel
- Fuel Pump
- Thermoplastic housing with stainless steel internals
Features
- Fuel Delivery
-
- Electronic fuel injection
- Variable fuel pressure regulation
- Returnless fuel system
- Monitoring
-
- Low fuel warning light
- Fuel level sensor
- Real-time fuel consumption display
- Safety
-
- Rollover valve
- Evaporative emissions control
- Impact-resistant fuel tank
- Efficiency
-
- Optimized fuel injectors
- Air-fuel ratio control
- Idle stop system (optional)
Safety Features
- Tank Protection
-
- Impact-resistant design
- Fire-resistant coating
- Leak Prevention
-
- Sealed fuel system
- Automatic shutoff valve
- Emissions Control
-
- Evaporative emissions system
- OBD-II compliant
Comfort Features
- Refueling
-
- Easy-access fuel door
- Capless fuel filler
- Automatic fuel shutoff
- Driving
-
- Smooth fuel delivery
- Consistent performance
- Low noise operation
Accessories
- Fuel Additives
-
- Fuel system cleaner
- Octane booster
- Water remover
- Maintenance Tools
-
- Fuel pressure tester
- Fuel line disconnect tool
- Fuel filter wrench
- Upgrades
-
- High-performance fuel pump
- Upgraded fuel injectors
- Aftermarket fuel pressure regulator
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Inspect fuel lines for leaks
- Replace fuel filter
- Check fuel pump operation
- Test fuel pressure
- Inspect fuel tank for damage
- Maintenance Notes
- Use only recommended fuel grade for optimal performance.
Warranty
- Basic Coverage
- Miles: 36,000Years: 3Coverage: Fuel system components
- Powertrain Coverage
- Miles: 60,000Years: 5Coverage: Fuel pump and injectors
- Emissions Coverage
- Miles: 80,000Years: 8Coverage: Evaporative emissions system
- Corrosion Coverage
- Miles: UnlimitedYears: 7Coverage: Fuel tank corrosion
Production Details
- Manufacturer
- Infiniti (Nissan Motor Co.)
- Manufacturing Process
-
- Injection molding for fuel tank
- Precision machining for fuel pump
- Automated assembly for fuel lines
- Quality Control
- Pressure Testing: 100% tested for leaksMaterial inspection: X-ray and ultrasonic testingPerformance Verification: Flow rate and pressure checks
- Sustainability Practices
-
- Recycled materials in fuel tank
- Low-emission manufacturing
- Energy-efficient production
- Production Metrics
- Annual Output: Approximately 50,000 unitsDefect Rate: Less than 0.1%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
- Check fuel pump operation
- Test fuel pressure
- Inspect fuel tank for damage
Use only manufacturer-approved parts for replacements.
- Replace fuel pump if necessary
- Clean fuel injectors
- Inspect evaporative emissions system
- Check fuel tank venting system
- Test fuel pressure regulator
Special diagnostic 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 may require fuel system depressurization.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2003-2008 Infiniti FX45?
What type of fuel is recommended for the 2003-2008 Infiniti FX45?
The 2003-2008 Infiniti FX45 requires premium unleaded gasoline with an octane rating of 91 or higher. Using lower-octane fuel may result in reduced performance, engine knocking, and potential long-term damage. The vehicle's 4.5L V8 engine is optimized for premium fuel to ensure maximum power output and efficiency. Always refer to the owner's manual for specific fuel recommendations and compatibility details.
Q2 What are the maintenance requirements for the fuel system in the Infiniti FX45?
What are the maintenance requirements for the fuel system in the Infiniti FX45?
The fuel system in the Infiniti FX45 requires regular maintenance to ensure optimal performance. This includes replacing the fuel filter every 30,000 miles, inspecting fuel lines for leaks or wear, and using fuel injector cleaner every 15,000 miles. Additionally, the fuel pump should be checked for proper operation during routine service intervals. Adhering to these maintenance tasks helps prevent fuel system issues and maintains engine efficiency.
Q3 How do I replace the fuel filter in a 2003-2008 Infiniti FX45?
How do I replace the fuel filter in a 2003-2008 Infiniti FX45?
To replace the fuel filter in a 2003-2008 Infiniti FX45, first, relieve the fuel system pressure by disconnecting the fuel pump fuse and running the engine until it stalls. Locate the fuel filter, typically near the fuel tank. Disconnect the fuel lines and remove the old filter. Install the new filter, ensuring proper orientation, and reconnect the fuel lines. Finally, reinstall the fuel pump fuse and start the engine to check for leaks.
Q4 What should I do if my Infiniti FX45 experiences fuel delivery issues?
What should I do if my Infiniti FX45 experiences fuel delivery issues?
If your Infiniti FX45 experiences fuel delivery issues, start by checking the fuel pump fuse and relay. Inspect the fuel lines for leaks or blockages and ensure the fuel filter is not clogged. Use a diagnostic tool to check for error codes related to the fuel system. If the issue persists, test the fuel pump's pressure and replace it if necessary. Always consult a professional mechanic for complex diagnostics and repairs.
Q5 How can I optimize fuel efficiency in my Infiniti FX45?
How can I optimize fuel efficiency in my Infiniti FX45?
To optimize fuel efficiency in your Infiniti FX45, maintain proper tire pressure, use premium unleaded fuel, and avoid aggressive driving habits. Regularly replace air filters and spark plugs, and ensure the fuel system is clean and functioning properly. Reducing vehicle weight and using cruise control on highways can also improve mileage. Adhering to the recommended maintenance schedule ensures the engine operates at peak efficiency.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2003-2008 Infiniti FX45 Service Manual
Coming SoonComprehensive guide covering maintenance, repairs, and technical specifications for the Infiniti FX45.
Infiniti FX45 Technical Service Bulletin
Coming SoonLatest updates and fixes for common issues in the 2003-2008 Infiniti FX45.
Infiniti FX45 Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts for the 2003-2008 Infiniti FX45.
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.
Legal Disclaimer
Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.