Should Volkswagen Cars Use 92 or 95 Octane Gasoline?

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Whether a Volkswagen car should use 92 or 95 octane gasoline depends on the specific model, and you can refer to the vehicle's user manual for details. Here is a detailed explanation: Using the Recommended Fuel Grade: Under normal circumstances, it is not recommended to switch to a gasoline grade lower than the standard specified in the vehicle manual. Using a lower octane gasoline can cause premature combustion, leading to engine knocking. Additionally, incomplete combustion of the gasoline can increase carbon deposits, potentially clogging the fuel lines and injectors, and may result in fuel supply interruptions or engine stalling. Differences Between 92 and 95 Octane Gasoline: The difference between 92 and 95 octane gasoline is not about quality but rather the content of added isooctane, which affects the gasoline's anti-knock properties. 95 octane gasoline has a higher isooctane content, making it slightly more expensive and providing better anti-knock performance. Different anti-knock properties are suitable for engines with different compression ratios. High-compression engines should use 95 octane gasoline, while low-compression engines can use 92 octane gasoline.