Why does Volkswagen mostly use 95-octane gasoline?
2 Answers
As a German car brand, Volkswagen, like most German cars on the market, predominantly uses 95-octane gasoline. Some attribute this to compression ratio factors, but the primary reason is that turbocharged engines are better suited for 95-octane fuel. The reasons why Volkswagen vehicles use 95-octane gasoline are as follows: Differences in octane additives: The variation in gasoline grades primarily lies in the octane additives (which affect anti-knock performance). Higher gasoline grades correspond to higher octane values, resulting in better anti-knock performance, making them more suitable for high-compression engines. However, this is not absolute, as it also depends on the manufacturer's technology, tuning, and the engine's inherent characteristics. Avoiding engine knocking: Volkswagen vehicles use 95-octane gasoline because most models under the brand are equipped with turbocharged engines. During high-speed driving, the turbocharger operates more intensely, imposing strict requirements on fuel quality. 95-octane gasoline has superior anti-knock properties compared to 92-octane. If German cars are fueled with 92-octane gasoline for extended periods, engine knocking may occur, which is highly dangerous.
I've been driving a Volkswagen for several years and found that using 95-octane gasoline is determined by the engine design. Many Volkswagen models like Golf or Passat have engines with higher compression ratios and greater combustion chamber pressure. If 92-octane fuel is used, it's prone to knocking—that knocking sound in the engine—which can damage pistons and cylinders over time. 95-octane fuel has a higher octane rating, ensuring stable combustion, protecting engine longevity, and improving power response, making acceleration smoother. Although it costs a few bucks more per fill-up, it saves on repair costs in the long run. My car has run 100,000 kilometers without any issues. Additionally, the manufacturer's manual emphasizes using 95-octane to ensure safety and meet emission standards, reducing risks. If the wrong fuel is used accidentally, it might trigger the check engine light, leading to expensive repairs. In short, once you get used to it, the driving experience improves significantly, especially when overtaking on highways—it gives you more confidence.
