2022-2025 Audi EA839 V6 TFSI: No Fuel Additives Permitted

Audi has issued Technical Service Bulletin (TSB) 00 24 98 2075515/2, which provides critical information regarding the use of fuel additives in vehicles equipped with the EA839 V6 TFSI engine. This bulletin, superseding an earlier version (24-94 dated October 8, 2024), explicitly prohibits the use of aftermarket fuel additives in affected 2022-2025 Audi models. The TSB highlights that while some fuel additives claim to remove carbon deposits, their use can have a negative impact on the engine's longevity and overall performance.

Important Warning: Do Not Use Fuel Additives

Audi's official position, as stated in TSB 00 24 98 2075515/2, is clear: "The use of fuel additives in vehicles equipped with the EA839 V6 TFSI engine is not approved and therefore also not permitted." This directive applies to a wide range of Audi models from 2022 to 2025 that feature this specific engine. Owners should strictly adhere to this guidance to prevent potential engine issues and maintain vehicle integrity. When considering any additions to your fuel, always prioritize Audi-approved petrol additives.

Symptoms Related to Fuel Additive Use

Owners who have used unapproved fuel additives in their Audi EA839 V6 TFSI engine might experience various symptoms. These issues often prompt a visit to the workshop. Common customer complaints and workshop findings include:

• Increased oil consumption: The engine may start using more oil than expected, indicating potential internal wear or issues.
• Engine not running smoothly: This can manifest as rough idling, hesitation, or inconsistent power delivery, affecting the overall driving experience.
• Engine maintenance requested: The vehicle's onboard system might display a message indicating that engine maintenance is required, even if no specific fault code is present.
• Carbon deposits: Workshop inspections, often using a borescope, may reveal carbon deposits in the combustion chamber or on injector nozzles. These deposits can hinder engine efficiency.
• Misfiring: The engine might experience misfires, leading to reduced power and potential damage to other components.
• No complaint can be determined ('engine maintenance'): In some cases, owners report general engine maintenance concerns without a clear, identifiable fault, which can be linked to the adverse effects of unapproved additives.

These symptoms underscore the potential risks associated with using non-approved Audi EA839 V6 TFSI fuel additives.

Why This Matters: The Technical Background

Audi's technical background for this bulletin explains that while some fuel additives are designed to remove carbon deposits from engine components like the combustion chamber, piston rings, or injection nozzles, there's a significant caveat. The TSB explicitly states that