Lexus SC 1991-2000 Fuel System Specifications
Explore detailed fuel specifications for the 1991-2000 Lexus SC, including fuel type, octane rating, fuel system components, and maintenance tips. Ideal for owners and mechanics seeking to optimize performance and fuel efficiency.
Overview Specifications
This document provides detailed fuel specifications for the 1991-2000 Lexus SC models. It includes information on fuel types, efficiency, tank capacity, and related technical details. Use this guide to understand the fuel requirements and performance metrics of the Lexus SC. The document is organized into sections for easy navigation, with a quick reference table for key specifications.
How to Use
Use the search functionality to find specific terms or phrases related to fuel specifications. Enter keywords like 'fuel type' or 'mileage' to quickly locate relevant information.
Navigate through the document using the section titles and subsections. Each section is labeled clearly, and subsections provide detailed points for easy reference.
Key Specifications
Fuel Type
Premium Unleaded (91+ octane)
Fuel Tank Capacity
21.1 gallons (80 liters)
City Mileage
18-20 mpg
Highway Mileage
24-26 mpg
Fuel System
Multi-port Injection
Available Specifications
Fuel Types and Requirements
This section covers the types of fuel recommended for the 1991-2000 Lexus SC models, including octane ratings and any special requirements for optimal performance.
Fuel Types and Requirements
This section covers the types of fuel recommended for the 1991-2000 Lexus SC models, including octane ratings and any special requirements for optimal performance.
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%
- Fuel additives are not required but can be used for maintenance
Fuel System Specifications
- Sequential multi-port fuel injection system
- Fuel tank capacity: 21.1 gallons (80 liters)
- Fuel pump pressure: 38-44 psi
- Fuel filter replacement interval: Every 30,000 miles
Fuel Efficiency and Mileage
This section provides details on the fuel efficiency of the Lexus SC models, including city and highway mileage estimates, as well as factors affecting fuel economy.
Fuel Efficiency and Mileage
This section provides details on the fuel efficiency of the Lexus SC models, including city and highway mileage estimates, as well as factors affecting fuel economy.
Mileage Estimates
- City mileage: 18-20 mpg
- Highway mileage: 24-26 mpg
- Combined mileage: 21-23 mpg
- Actual mileage may vary based on driving conditions
Factors Affecting Fuel Economy
- Driving habits (aggressive driving reduces efficiency)
- Vehicle maintenance (clean air filters improve mileage)
- Tire pressure (underinflated tires increase fuel consumption)
- Environmental conditions (cold weather reduces efficiency)
Fuel Tank and Refueling
This section covers the fuel tank design, refueling procedures, and safety precautions for the Lexus SC models.
Fuel Tank and Refueling
This section covers the fuel tank design, refueling procedures, and safety precautions for the Lexus SC models.
Fuel Tank Design
- 21.1-gallon (80-liter) capacity
- Plastic fuel tank for durability and corrosion resistance
- Fuel filler neck located on the driver's side rear
- Integrated fuel vapor recovery system
Refueling Procedures
- Turn off the engine before refueling
- Use the correct fuel grade as specified in the owner's manual
- Avoid overfilling the tank to prevent spillage
- Ensure the fuel cap is securely tightened after refueling
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Component Specifications
Overview
- Type
- Gasoline
- Configuration
- Internal Combustion Engine
- Platform
- Rear-Wheel Drive
- Material
- Steel and Aluminum
- Location
- Fuel Tank: Rear of Vehicle
Dimensions
- Fuel Tank Capacity
- 18.5 gallons (70 liters)
- Fuel Line Diameter
- 0.375 inches (9.525 mm)
- Fuel Pump Pressure
- 44 psi (303 kPa)
- Fuel Filter Size
- 2.5 inches x 1.5 inches (63.5 mm x 38.1 mm)
- Fuel injector Flow Rate
- 150 cc/min
- Fuel Rail Length
- 24 inches (609.6 mm)
- Fuel Tank Weight
- 15 lbs (6.8 kg) when empty
Materials
- Fuel Tank
- High-density polyethylene
- Fuel Lines
- Nitrile rubber with steel reinforcement
- Fuel Pump
- Stainless steel and plastic composite
- Fuel injectors
- Aluminum alloy with stainless steel nozzles
Features
- Fuel Delivery
-
- Electronic fuel injection
- Sequential multi-port injection
- High-pressure fuel pump
- Returnless fuel system
- Fuel Management
-
- Oxygen sensor feedback
- Closed-loop fuel control
- Adaptive fuel trim
- Evaporative emissions control
- Fuel Storage
-
- Impact-resistant fuel tank
- Rollover valve
- Vapor recovery system
- Fuel level sensor
- Fuel Quality
-
- Fuel filter with water separator
- Anti-siphon protection
- Rust-resistant fuel lines
- Ethanol-compatible materials
Safety Features
- Crash Safety
-
- Fuel cutoff switch
- Impact-resistant fuel tank
- Automatic fuel shutoff
- Fire Prevention
-
- Flame arrestor in fuel filler neck
- Fuel line quick-disconnect fittings
- Heat shields around fuel components
Comfort Features
- Refueling
-
- Easy-access fuel filler door
- Capless fuel filler system
- Fuel level indicator with low fuel warning
- Noise Reduction
-
- Insulated fuel lines
- Quiet fuel pump operation
- Vibration-dampened fuel tank mounts
Accessories
- Performance
-
- High-flow fuel filter
- Aftermarket fuel pressure regulator
- Upgraded fuel injectors
- Maintenance
-
- Fuel system cleaner
- Fuel line disconnect tool
- Fuel pressure tester
- Diagnostics
-
- OBD-II scanner
- Fuel pressure gauge
- Injector pulse tester
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Replace fuel filter
- Inspect fuel lines for leaks
- Clean fuel injectors
- Check fuel pump pressure
- Inspect fuel tank for damage
- Maintenance Notes
- Use only premium unleaded gasoline (91 octane or higher) for optimal performance.
Warranty
- Basic Warranty
- Miles: 50,000Years: 4Coverage: Fuel system components excluding wear items
- Powertrain Warranty
- Miles: 70,000Years: 6Coverage: Fuel pump and injectors
- Emissions Warranty
- Miles: 80,000Years: 8Coverage: Fuel system emissions components
- Corrosion Warranty
- Miles: UnlimitedYears: 5Coverage: Fuel tank corrosion perforation
Production Details
- Manufacturer
- Lexus Division, Toyota Motor Corporation
- Manufacturing Process
-
- Robotic welding of fuel tank
- Precision machining of fuel injectors
- Automated assembly of fuel pump
- Quality Control
- Pressure Testing: 100% of fuel tanks testedLeak Detection: Helium leak testing for fuel linesPerformance Validation: Fuel pump flow rate verification
- Sustainability Practices
-
- Recycled materials in fuel tank construction
- Low-VOC fuel line materials
- Energy-efficient manufacturing processes
- Production Metrics
- Annual Production: 50,000 unitsDefect Rate: 0.01%Recycling Rate: 95% of fuel system components
Service Information for Fuel System Service
Maintenance and service requirements specific to the fuel system
- Replace fuel filter
- Inspect fuel lines for leaks
- Check fuel pump pressure
- Clean fuel injectors
- Inspect fuel tank for damage
Use only manufacturer-approved fuel system cleaners.
- Replace fuel pump if necessary
- Inspect fuel rail for corrosion
- Check fuel pressure regulator
- Test fuel injector flow rates
- Inspect evaporative emissions system
Special tools required for fuel pressure testing.
- Replace fuel pump assembly
- Replace fuel injectors
- Inspect and clean fuel tank
- Replace all fuel lines
- Perform complete fuel system diagnostic
Major service interval requires professional equipment and expertise.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of fuel is compatible with the 1991-2000 Lexus SC?
What type of fuel is compatible with the 1991-2000 Lexus SC?
The 1991-2000 Lexus SC models are 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 engine knocking. Always refer to the owner's manual for specific fuel recommendations and avoid using ethanol blends exceeding 10% to prevent potential damage to the fuel system.
Q2 What are the maintenance requirements for the fuel system in a 1991-2000 Lexus SC?
What are the maintenance requirements for the fuel system in a 1991-2000 Lexus SC?
Regular maintenance for the fuel system includes inspecting and replacing the fuel filter every 30,000 miles, checking fuel injectors for clogs, and ensuring the fuel pump operates correctly. Additionally, use fuel system cleaners periodically to maintain injector performance. Always follow the manufacturer's recommended maintenance schedule to ensure optimal fuel efficiency and engine performance.
Q3 How do I replace the fuel pump in a 1991-2000 Lexus SC?
How do I replace the fuel pump in a 1991-2000 Lexus SC?
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 the system for leaks before operating the vehicle.
Q4 What should I do if my 1991-2000 Lexus SC experiences fuel delivery issues?
What should I do if my 1991-2000 Lexus SC experiences fuel delivery issues?
If your vehicle has fuel delivery issues, start by checking the fuel pump fuse and relay. Inspect the fuel filter for clogs and test the fuel pressure using a gauge. If pressure is low, the fuel pump may need replacement. Additionally, inspect fuel injectors for blockages and ensure the fuel tank has adequate fuel. Consult a professional if issues persist.
Q5 How can I optimize fuel efficiency in my 1991-2000 Lexus SC?
How can I optimize fuel efficiency in my 1991-2000 Lexus SC?
To optimize fuel efficiency, use premium unleaded gasoline, maintain proper tire pressure, and replace air filters regularly. Avoid aggressive driving and excessive idling. Ensure the fuel system is clean and free of clogs. Regular engine tune-ups and using the recommended oil grade can also improve fuel economy. Always adhere to the manufacturer's maintenance schedule.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
1991-2000 Lexus SC Service Manual
Coming SoonComprehensive guide covering maintenance, repairs, and technical specifications for the 1991-2000 Lexus SC models.
Technical Service Bulletin: Fuel System Updates
Coming SoonDetails updates and fixes for common fuel system issues in 1991-2000 Lexus SC models.
Lexus SC Parts and Accessories Catalog
Coming SoonCatalog listing OEM and aftermarket parts for the 1991-2000 Lexus SC, including fuel system components.
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Technical Information
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