Audi Audi S6 1999-2004

Audi Audi S6 1999-2004 Fuel System Specifications

Detailed technical guide for the 1999-2004 Audi S6 fuel system, covering fuel type, pressure, injector specs, pump details, and maintenance. Essential for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the fuel specifications for the 1999-2004 Audi S6, including key features, measurements, and technical details

How to Use

Use the search function to locate specific fuel specifications by entering keywords such as 'octane rating', 'fuel capacity', or 'emission standards'.

Navigate through the fuel documentation sections using the table of contents or by scrolling through the document. Each major section is labeled with a title and contains subsections for detailed information.

Key Specifications

Octane Rating

91 (RON 95) minimum

Fuel Tank Capacity

70 liters (18.5 gallons)

Fuel Pump Pressure

3.8 bar (55 psi)

CO2 Emissions

280 g/km (combined cycle)

Fuel Injector Flow Rate

220 cc/min at 3 bar

Available Specifications

Fuel Type and Quality

Details about the recommended fuel type, quality standards, and octane rating for optimal performance

Recommended Fuel Type

Premium unleaded gasoline with a minimum octane rating of 91 (RON 95)
Do not use gasoline with a lower octane rating to avoid engine knocking
Ethanol blends up to 10% (E10) are acceptable
Avoid using diesel or alternative fuels not specified by Audi

Fuel Quality Standards

Complies with EN 228 European fuel standard
Must meet ASTM D4814 specifications for gasoline
Ensure fuel is free from contaminants and water
Use fuel additives only if approved by Audi

Note: Using substandard fuel may void the vehicle warranty.

Fuel System Specifications

Technical details about the fuel system, including tank capacity, fuel delivery, and pressure requirements

Fuel Tank Capacity

Total fuel tank capacity: 70 liters (18.5 gallons)
Reserve fuel capacity: 10 liters (2.6 gallons)
Fuel tank material: High-density polyethylene (HDPE)
Fuel tank design: Dual-chamber for improved safety

Fuel Delivery System

Sequential multi-port fuel injection (SFI)
Fuel pump pressure: 3.8 bar (55 psi)
Fuel filter replacement interval: Every 60,000 km (37,000 miles)
Fuel injector flow rate: 220 cc/min at 3 bar

Emission and Environmental Compliance

Information about emission standards, environmental regulations, and fuel efficiency

Emission Standards

Complies with Euro 3 emission standards
Equipped with a catalytic converter and oxygen sensors
Evaporative emission control system (EVAP) included
CO2 emissions: 280 g/km (combined cycle)

Fuel Efficiency

Urban fuel consumption: 14.5 L/100 km (16.2 mpg)
Extra-urban fuel consumption: 8.2 L/100 km (28.7 mpg)
Combined fuel consumption: 10.5 L/100 km (22.4 mpg)
Fuel efficiency optimized for performance driving

Note: Actual fuel consumption may vary based on driving conditions and style.

Search Specifications

Search by specification name, value, or description

Component Specifications

Fuel Type

Recommended Fuel: Premium unleaded gasoline (91 AKI or 95 RON minimum)

Alternative Fuel: Regular unleaded gasoline (87 AKI or 91 RON) with reduced performance

Ethanol Content: Maximum 10% ethanol (E10)

Octane Rating: 91 AKI (Anti-Knock Index) or higher

Note: Using lower octane fuel may cause engine knocking and reduced performance

Fuel System

Fuel Delivery: Sequential multi-port fuel injection

Fuel Pump Pressure: 3.8 - 4.2 bar (55 - 61 psi)

Fuel Filter Part Number: 8D0 201 511

Fuel Tank Capacity: 70 liters (18.5 gallons)

Fuel Tank Material: High-density polyethylene (HDPE)

Fuel injectors

Type: Bosch EV6 injectors

Flow Rate: 210 cc/min at 3 bar

Resistance: 12 - 16 ohms

Part Number: 0280 155 968

Note: Injectors are pulse-width modulated for precise fuel delivery

Fuel Pump

Type: Electric in-tank fuel pump

Flow Rate: 120 liters/hour at 3 bar

Voltage: 12V DC

Part Number: 8D0 906 091

Note: Fuel pump is controlled by the fuel pump relay and engine control module (ECM)

Fuel Pressure Regulator

Type: Mechanical diaphragm regulator

Pressure Setting: 3.8 bar (55 psi)

Part Number: 078 133 534

Location: Integrated into the fuel rail

Note: Maintains consistent fuel pressure to the injectors

Fuel Rail

Material: Stainless steel

Pressure Rating: 5 bar (72.5 psi) maximum

Part Number: 078 133 517

Note: Fuel rail distributes fuel to the injectors and houses the pressure regulator

Fuel Filter

Type: In-line cartridge filter

Micron Rating: 10 microns

Replacement interval: Every 60,000 miles or 5 years

Part Number: 8D0 201 511

Note: Fuel filter should be replaced during major service intervals

Emissions Compliance

Standards: EURO 3 emissions standard

Evaporative Emissions System: Active charcoal canister with purge valve

Part Number Canister: 8D0 201 801

Part Number Purge Valve: 06A 906 517

Note: System reduces hydrocarbon emissions from fuel vapors

Diagnostic Specifications

Fuel Pressure Test: Procedure: Connect fuel pressure gauge to the fuel rail test port
Specification: 3.8 - 4.2 bar (55 - 61 psi) at idle
Note: Pressure should remain stable under load

injector Balance Test: Procedure: Use diagnostic scan tool to perform injector balance test
Specification: Flow variation should be less than 5% between injectors
Note: Excessive variation indicates a faulty injector

Fuel Pump Current Draw: Procedure: Measure current draw at the fuel pump connector
Specification: 5 - 7 amps at 12V
Note: High current draw may indicate a failing fuel pump

Maintenance Specifications

Fuel System Cleaning: interval: Every 30,000 miles or 2 years
Procedure: Use Audi-approved fuel system cleaner
Note: Cleaning helps maintain injector performance and fuel economy

Fuel Filter Replacement: interval: Every 60,000 miles or 5 years
Part Number: 8D0 201 511
Note: Replacement is critical to prevent fuel system contamination

Fuel Tank inspection: interval: Every 100,000 miles or 10 years
Procedure: Inspect for leaks, cracks, or damage
Note: Replace fuel tank if any damage is detected

Service Information Service

Detailed service requirements and schedules for the fuel system

30,000 miles

24 months

Inspect fuel lines and connections for leaks
Perform fuel system cleaning
Check fuel pump operation

Regular inspection ensures fuel system integrity

60,000 miles

60 months

Replace fuel filter
Inspect fuel injectors
Check fuel pressure regulator

Critical maintenance to prevent fuel system issues

100,000 miles

120 months

Inspect fuel tank for damage or leaks
Replace fuel pump if necessary
Perform comprehensive fuel system diagnostics

Major service interval for long-term reliability

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of fuel is recommended for the 1999-2004 Audi S6?

The 1999-2004 Audi S6 requires premium unleaded gasoline with an octane rating of 91 or higher. Using lower octane fuel may result in reduced performance and potential engine knocking.

What is the fuel tank capacity of the 1999-2004 Audi S6?

The fuel tank capacity of the 1999-2004 Audi S6 is 70 liters (18.5 gallons). This allows for a range of approximately 500-600 kilometers (310-370 miles) under normal driving conditions.

Can I use ethanol-blended fuel in the 1999-2004 Audi S6?

The 1999-2004 Audi S6 is compatible with ethanol-blended fuels containing up to 10% ethanol (E10). However, using fuels with higher ethanol content may cause damage to the fuel system and is not recommended.

What is the fuel consumption rate for the 1999-2004 Audi S6?

The 1999-2004 Audi S6 has an average fuel consumption rate of approximately 12.5 liters per 100 kilometers (18.8 mpg) in urban driving and 8.5 liters per 100 kilometers (27.7 mpg) on the highway.

How often should I replace the fuel filter on the 1999-2004 Audi S6?

The fuel filter on the 1999-2004 Audi S6 should be replaced every 60,000 kilometers (37,000 miles) or as specified in the vehicle's maintenance schedule. Regular replacement ensures optimal fuel flow and engine performance.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

Audi S6 Fuel System Maintenance Guide

Coming Soon

A detailed guide on maintaining the fuel system of the 1999-2004 Audi S6, including fuel filter replacement and fuel injector cleaning.

Understanding Octane Ratings and Fuel Types

Coming Soon

An informative resource explaining octane ratings, fuel types, and their impact on vehicle performance, specifically tailored for Audi vehicles.

Audi S6 Fuel Efficiency Tips

Coming Soon

Practical tips and driving techniques to improve fuel efficiency in the 1999-2004 Audi S6, helping you save on fuel costs.

Audi Genuine Fuel System Components

Coming Soon

Information on the importance of using genuine Audi fuel system components to ensure optimal performance and avoid warranty issues.

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