It is safe to change your oil any time before the MM reaches 0%. No damage will be done to the engine by changing the oil too often. Many will argue that you should leave the factory fill, along with the molybdenum added to the bearing surfaces during assembly, until the MM tells you to change it.

Standard maintenance services thereafter occur at intervals of 20,000 miles or every 2 years after the last standard maintenance service, whichever occurs first. NOTE: The intervals shown in this table are based on vehicles operating under normal conditions. Audi TT 8N (1998 – 2006) – prescribed amounts of engine oil and service intervalsAudi TT, TTS, TT RS, 8J3 (2006 – 2014) – prescribed amounts of engine oil and service intervalsAudi TT, TTS, TT RS Roadster, 8J9 (2007 – 2014) ) - prescribed amounts of engine oil and service intervals Audi TT, TTS, FV3 (2014 - ) - prescribed amounts of engine oil and
For the first number, the climate you live in matters more than anything else. If you live in a cold place, go with 0W or 5W. If you live in a place with moderate temperatures, go with 10W, and if you live in a warm place, go with 15W or 20W. Because turbocharged engines generate a lot of heat, choose either 30 or 40 for the second number.
Oil changes in your Audi should be performed every 5000 or 7500 miles, depending on the particular vehicle/engine, despite Audi’s claim of 10,000-mile intervals. Why more often than Audi’s claim? In recent years, most manufacturers have increased recommended oil change intervals to reflect improved motor oil quality and technology as well

For a complete oil change, most Audi TT models require approximately 4.5 to 5.5 liters of oil. Proper oil capacity is vital to avoid engine damage and maintain optimal functioning. Check your Audi TT oil capacity regularly and add oil as needed to reach the recommended level.

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audi recommended oil change interval