Infiniti FX35 2003-2008 Fuel System Specifications
Explore detailed fuel specifications for the 2003-2008 Infiniti FX35, including fuel type, tank capacity, economy, and emissions. Ideal for maintenance, troubleshooting, and upgrades.
Overview Specifications
This document provides detailed fuel specifications and related information for the 2003-2008 Infiniti FX35. It is designed to assist owners, mechanics, and enthusiasts in understanding the vehicle's fuel system, requirements, and performance. Use the search functionality to locate specific terms or navigate through sections to explore fuel-related details systematically.
How to Use
Use the search bar to enter keywords related to fuel specifications, such as 'fuel type' or 'tank capacity.' Results will highlight relevant sections and subsections for quick access.
Scroll through the document or use the table of contents to jump to major sections like 'Fuel Requirements' or 'Fuel Efficiency.' Subsections provide detailed technical points for each topic.
Key Specifications
Fuel Type
Premium Unleaded (91+ octane)
Fuel Tank Capacity
23.8 gallons
City MPG
15 mpg
Highway MPG
21 mpg
Combined MPG
17 mpg
Available Specifications
Fuel Requirements
This section outlines the type of fuel recommended for the 2003-2008 Infiniti FX35, including octane ratings and any additives or treatments suggested by the manufacturer. It also covers potential consequences of using incorrect fuel types.
Fuel Requirements
This section outlines the type of fuel recommended for the 2003-2008 Infiniti FX35, including octane ratings and any additives or treatments suggested by the manufacturer. It also covers potential consequences of using incorrect fuel types.
Recommended Fuel Type
- Premium unleaded gasoline with an octane rating of 91 or higher
- Regular unleaded gasoline (87 octane) can be used but may reduce performance
- Avoid using diesel or ethanol blends above 10% (E10)
- Using lower octane fuel may cause engine knocking
Fuel Additives
- Use fuel system cleaners periodically to maintain injector performance
- Avoid additives containing methanol or silicone
- In cold climates, use fuel line antifreeze to prevent freezing
- Consult the owner's manual for manufacturer-approved additives
Fuel Tank and Capacity
This section provides details about the fuel tank, including its capacity, materials, and design. It also covers fuel gauge accuracy and refueling tips.
Fuel Tank and Capacity
This section provides details about the fuel tank, including its capacity, materials, and design. It also covers fuel gauge accuracy and refueling tips.
Fuel Tank Specifications
- Fuel tank capacity: 23.8 gallons (90 liters)
- Material: High-density polyethylene for durability and corrosion resistance
- Includes a fuel vapor recovery system to reduce emissions
- Fuel gauge accuracy may vary based on driving conditions
Refueling Tips
- Always turn off the engine before refueling
- Use the fuel filler door release located inside the vehicle
- Avoid overfilling to prevent fuel spillage
- Replace the fuel cap securely to maintain pressure
Fuel Efficiency
This section discusses the fuel efficiency of the 2003-2008 Infiniti FX35, including EPA estimates, factors affecting mileage, and tips for improving fuel economy.
Fuel Efficiency
This section discusses the fuel efficiency of the 2003-2008 Infiniti FX35, including EPA estimates, factors affecting mileage, and tips for improving fuel economy.
EPA Fuel Economy Estimates
- City driving: 15 miles per gallon (mpg)
- Highway driving: 21 mpg
- Combined city/highway: 17 mpg
- Actual mileage may vary based on driving habits and conditions
Improving Fuel Efficiency
- Maintain proper tire pressure to reduce rolling resistance
- Avoid aggressive acceleration and braking
- Use cruise control on highways to maintain consistent speed
- Remove excess weight from the vehicle to improve mileage
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Component Specifications
Overview
- Type
- Gasoline
- Octane Rating
- 91 (recommended)
- Fuel System
- Sequential Multi-Port Fuel Injection
- Tank Capacity
- 21.1 gallons (79.9 liters)
- Fuel Economy City
- 16 mpg (14.7 L/100km)
- Fuel Economy Highway
- 22 mpg (10.7 L/100km)
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
- 0.375 inches (9.5 mm)
- Fuel Pump Output
- 45 psi (310 kPa)
- Fuel Filter Size
- 2.5 inches x 1.75 inches (6.35 cm x 4.45 cm)
Materials
- Tank Material
- High-density polyethylene
- Fuel Lines
- Nitrile rubber with steel braiding
- Filler Neck
- Stainless steel
- Fuel Pump
- Thermoplastic housing with stainless steel internals
- Fuel Filter
- Cellulose media with metal casing
Features
- Fuel Delivery
-
- Electronic fuel injection
- Variable fuel pressure regulation
- Returnless fuel system
- Monitoring
-
- Fuel level sensor
- Low fuel warning light
- Real-time fuel economy display
- Safety
-
- Rollover valve
- Evaporative emissions control
- Fuel cut-off switch
- Efficiency
-
- Optimized fuel injector spray pattern
- Lightweight fuel tank design
- Aerodynamic fuel filler cap
Safety Features
- Tank Protection
-
- Impact-resistant tank material
- Shielded fuel lines
- Fire Prevention
-
- Automatic fuel shut-off
- Flame arrestor in filler neck
- Emissions Control
-
- Sealed fuel system
- Charcoal canister for vapor recovery
Comfort Features
- Refueling
-
- Easy-access fuel door
- Capless fuel filler
- Automatic fuel door release
- Driving
-
- Smooth fuel delivery
- Quiet fuel pump operation
- Stable fuel pressure
Accessories
- Aftermarket
-
- High-performance fuel pump
- Upgraded fuel filter
- Fuel system cleaner
- Maintenance
-
- Fuel injector cleaner
- Fuel system test kit
- Fuel pressure gauge
- Protection
-
- Fuel tank skid plate
- Fuel line protectors
- Fuel filler lock
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
- Maintenance Notes
- Use only recommended fuel grade for optimal performance and longevity.
Warranty
- Basic
- Miles: 60,000Years: 4Coverage: Fuel pump and fuel delivery system
- Emissions
- Miles: 80,000Years: 8Coverage: Evaporative emissions components
- Corrosion
- Miles: UnlimitedYears: 7Coverage: Fuel tank corrosion perforation
- Extended
- Miles: 100,000Years: 6Coverage: Fuel system components (optional)
Production Details
- Manufacturer
- Infiniti (Nissan Motor Company)
- Manufacturing Process
-
- Injection molding for fuel tank
- Robotic assembly for fuel lines
- Precision machining for fuel pump
- Quality Control
- Pressure Testing: 100% of fuel tanksLeak Testing: All fuel system componentsPerformance Validation: Fuel pump flow rate and pressure
- Sustainability Practices
-
- Recycled materials in fuel tank
- Low-emission manufacturing
- Eco-friendly packaging
- Production Metrics
- Annual Units: 50,000Defect Rate: 0.01%Energy Efficiency: 15% improvement over previous model
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 OEM or equivalent replacement parts
- Clean fuel injectors
- Inspect evaporative emissions system
- Check fuel filler neck and cap
- Test fuel level sensor accuracy
- Inspect fuel tank straps
Perform fuel system diagnostic scan
- Replace fuel pump assembly
- Inspect and clean fuel tank
- Replace all fuel lines
- Test fuel pressure regulator
- Perform complete fuel system flush
Consider replacing fuel filter again if not done at 60,000 miles
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is recommended for the 2003-2008 Infiniti FX35?
What type of fuel is recommended for the 2003-2008 Infiniti FX35?
The 2003-2008 Infiniti FX35 is designed to run on premium unleaded gasoline with an octane rating of 91 or higher. Using lower-octane fuel may result in reduced performance and fuel efficiency. The vehicle's 3.5L V6 engine is optimized for premium fuel to ensure optimal power output and engine longevity. Always refer to the owner's manual for specific fuel recommendations.
Q2 What is the recommended maintenance schedule for the Infiniti FX35?
What is the recommended maintenance schedule for the Infiniti FX35?
The Infiniti FX35 requires regular maintenance to ensure peak performance. Key intervals include oil changes every 5,000 miles, tire rotations every 7,500 miles, and air filter replacements every 15,000 miles. Additionally, inspect the brake system, coolant, and transmission fluid annually. Adhering to the maintenance schedule outlined in the owner's manual will help prevent costly repairs and maintain vehicle reliability.
Q3 How do I replace the fuel filter on a 2003-2008 Infiniti FX35?
How do I replace the fuel filter on a 2003-2008 Infiniti FX35?
To replace the fuel filter on a 2003-2008 Infiniti FX35, first, relieve the fuel system pressure by disconnecting the fuel pump fuse and running the engine until it stalls. Locate the fuel filter near the fuel tank. Disconnect the fuel lines and mounting bolts, then remove the old filter. Install the new filter, reconnect the fuel lines, and secure it with the mounting bolts. Finally, reconnect the fuel pump fuse and start the engine to check for leaks.
Q4 What should I do if my Infiniti FX35 has poor fuel efficiency?
What should I do if my Infiniti FX35 has poor fuel efficiency?
Poor fuel efficiency in the Infiniti FX35 can result from several factors, including dirty air filters, underinflated tires, or a malfunctioning oxygen sensor. Start by checking and replacing the air filter if necessary. Ensure tires are inflated to the recommended pressure. If issues persist, have the oxygen sensor and fuel injectors inspected by a professional. Regular maintenance and using premium fuel can also improve fuel economy.
Q5 How can I optimize the performance of my Infiniti FX35?
How can I optimize the performance of my Infiniti FX35?
To optimize the performance of your Infiniti FX35, use premium fuel as recommended, ensure regular maintenance, and keep the engine and air intake system clean. Upgrading to high-performance tires and using synthetic oil can also enhance performance. Additionally, consider installing a performance exhaust system or ECU tuning for improved power output. Always consult a professional before making significant modifications.
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 FX35 Owner's Manual
Coming SoonComprehensive guide covering vehicle operation, maintenance schedules, and troubleshooting tips for the Infiniti FX35.
Infiniti FX35 Technical Service Bulletin (TSB)
Coming SoonCollection of technical service bulletins addressing common issues and updates for the 2003-2008 Infiniti FX35.
Infiniti FX35 Parts and Accessories Catalog
Coming SoonDetailed catalog of OEM and aftermarket parts and accessories for the 2003-2008 Infiniti FX35.
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