Audi Audi TT 1998-2006 Fuel System Specifications

• Use unleaded gasoline with a minimum octane rating of 91 RON (Research Octane Number).
• Premium unleaded gasoline (95 RON or higher) is recommended for optimal performance.
• Do not use leaded gasoline or fuels with metallic additives.
• Ethanol-blended fuels (up to 10% ethanol) are acceptable.

• Minimum octane rating: 91 RON.
• Recommended octane rating: 95 RON or higher.
• Using lower octane fuel may result in engine knocking and reduced performance.
• Higher octane fuel improves combustion efficiency and power output.

Note: Using fuel with an octane rating below 91 RON may void the vehicle's warranty.

• Fuel tank capacity: 55 liters (14.5 gallons).
• Material: High-density polyethylene (HDPE) for durability and corrosion resistance.
• Includes an integrated fuel level sensor for accurate fuel gauge readings.
• Designed to minimize fuel sloshing and vapor loss.

• Electric fuel pump delivers fuel at a pressure of 3.8 bar (55 psi).
• High-pressure fuel injectors ensure precise fuel delivery to the combustion chamber.
• Injector flow rate: 200 cc/min at 3 bar pressure.
• Fuel pump is located inside the fuel tank for cooling and noise reduction.

Note: Regular maintenance of the fuel pump and injectors is essential to prevent clogging and ensure optimal performance.

• Operating pressure: 3.8 bar (55 psi).
• Maximum pressure: 5.0 bar (72.5 psi).
• Pressure is regulated by the fuel pressure regulator.
• Low fuel pressure can cause engine misfires and poor performance.

• Fuel flow rate: 120 liters per hour (31.7 gallons per hour) at full load.
• Flow rate is controlled by the engine control unit (ECU) based on throttle position and engine load.
• Insufficient fuel flow can lead to lean combustion and engine damage.
• Excessive fuel flow may cause rich combustion and increased emissions.

Note: Fuel flow rate is critical during high-performance driving or under heavy load conditions.

• City driving: 11.5 liters per 100 km (20.5 mpg).
• Highway driving: 7.2 liters per 100 km (32.7 mpg).
• Combined driving: 8.8 liters per 100 km (26.7 mpg).
• Fuel consumption may vary based on driving conditions and vehicle load.

• Use of premium fuel improves combustion efficiency by up to 5%.
• Regular maintenance of the fuel system can improve efficiency by 2-3%.
• Avoiding aggressive driving can reduce fuel consumption by up to 15%.
• Proper tire inflation and alignment contribute to better fuel efficiency.

Note: Fuel efficiency is maximized when the vehicle is operated within recommended parameters.