What kind of fuel does an Audi A6 use?

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Audi A6 uses 95 octane gasoline. Here is more relevant information: 1. Gasoline octane rating: The octane rating of gasoline represents its anti-knock performance. The gasoline octane rating used by different cars depends on the engine's compression ratio. If an engine uses gasoline with an octane rating lower than the specified value, knocking phenomenon will occur. 2. Anti-knock performance: Anti-knock performance refers to gasoline's ability to resist knocking when burning in the engine. It is the primary indicator of gasoline's combustion performance. Knocking is caused by abnormal combustion of gasoline in the engine. The octane number is precisely the target for gasoline's anti-knock performance. The higher the octane number, the stronger the anti-knock performance. The higher the compression ratio, the higher the combustion chamber pressure. If gasoline with low anti-knock performance is used, knocking is more likely to occur.