Peace be upon you Do you put 95 octane gasoline in your Changan... and after a while you feel that the fuel consumption has increased or the throttle response has changed? Why does this happen? The question that is always asked of us: Does Changan require 95 octane gasoline? The short answer: No. Most Changan engines are designed to run on 91. What is the technical reason? Changan engines, especially the turbo ones, are programmed for a combustion pressure suitable for 91 octane gasoline. When you put 95, it doesn't give you extra power as some people think, because the car's computer doesn't need a higher octane in the first place. On the contrary, sometimes it happens: • Higher fuel consumption • Slight difference in throttle response • Combustion is not as efficient as expected When do we use 95? We only use it in specific cases: • If there is sputtering or knocking during combustion • If the engine has been modified • Or if there is a problem with the combustion system Otherwise, 91 is the natural choice for the engine. The question that is always asked of us: Does 95 harm the engine? It doesn't harm it directly, but it doesn't give you any real benefit if the engine is fundamentally designed for 91. So, when do we know that the gasoline is the cause of the problem? Inside the workshop, we perform: Computer diagnosis of the engine Reading the combustion ratio Checking the turbo and injectors Pre- and post-testing And then we determine the real cause if it is: • Gasoline • Spark plugs • Injectors • Or the beginning of weakness in the turbo. Conclusion If your car is a Changan and you are confused between 91 and 95, the original choice is 91 unless there is a technical reason that makes us change it. And if you feel a change in fuel consumption or torque, it is best to have it inspected before the problem gets bigger. A radical and guaranteed solution inside the workshop. And if the problem is not solved after inspection and repair, you are not obligated to pay. Contact us via WhatsApp or call 📞