Does your Changan engine feel weaker or run hotter when you fill up with 91 octane? Or do you hear its sound change after a while? Many Changan owners come to our workshop with the same question: "Why do you say to use 95 octane? What's the difference anyway?" Let us explain it as we tell our customers inside the workshop. ⸻ The problem we see a lot Some Changan turbo cars run on 91 octane for a while, and then problems start to appear, such