What are the consequences of using 92 octane gasoline in an Audi Q3?

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Occasional use is acceptable, but Audi Q3 recommends using 95 octane gasoline. If used too frequently, the compression ratio in the engine will become inconsistent, leading to premature "knocking" of the gasoline. This can result in the engine feeling weak and underpowered while driving. Introduction to Gasoline: Gasoline is a volatile, flammable hydrocarbon mixture liquid distilled and cracked from petroleum, used as fuel. It appears as a transparent liquid, is combustible, with a distillation range of 30 to 220 degrees Celsius. Its main components are C5-C12 aliphatic hydrocarbons and cycloalkanes, along with a certain amount of aromatic hydrocarbons. Gasoline Grades: Gasoline has a high octane rating (anti-knock combustion performance) and is categorized into different grades based on octane levels, such as 89, 90, 92, 93, 95, 97, and 98. Starting from January 2012, the gasoline grades 90, 93, and 97 were revised to 89, 92, and 95, respectively.