Can 98 and 95 Octane Gasoline Be Mixed?
2 Answers
98 and 95 octane gasoline can be mixed. Here is an introduction to relevant knowledge about gasoline: 1. New regulations on gasoline use: Since the nationwide implementation of the China V emission standard, the fuel grades have been redefined, canceling the original 93 and 97 octane gasoline and replacing them with 92 and 95 octane gasoline, while adding 98 octane gasoline. 2. Precautions for mixing gasoline: Mixing gasoline should only be done in emergencies and not for prolonged periods, as prolonged use of mixed gasoline can easily damage the car engine. 95 octane gasoline indicates that its octane content is 95%, and 98 octane gasoline has an octane content of 98%. The grade of fuel to be added to a car is determined by the compression ratio of the car engine's cylinders.
I understand that gasoline grades are mainly determined by octane ratings, with 98-octane being more resistant to knocking than 95-octane, making it suitable for high-performance engines. When mixed, the engine's ignition system will adaptively adjust, optimizing combustion under ECU control, so short-term mixing is safe. However, engines are designed for the recommended grade. If the car manual requires 98-octane, long-term use of 95-octane will lower the octane value, potentially reducing power slightly, increasing fuel consumption, and slightly raising the risk of carbon deposits. It's recommended to mix only in emergencies or to save money, while using the appropriate fuel normally is better. From a technical perspective, the uniformity of mixed fuel is not an issue as long as the fuel is clean, and it won't affect most cars, but sensitive engines should be monitored for abnormal noises.
