Mixing 92 and 95 octane gasoline once or twice has no impact on the vehicle. Therefore, when the fuel warning light comes on, you can switch to 95 octane gasoline; there's no need to wait until a specific amount of fuel remains before making the switch. Below is relevant information about automotive gasoline: Anti-knock quality: The evaluation index for gasoline's anti-knock quality is the octane number, which is the gasoline's grade. It represents the ratio of the actual anti-knock quality of gasoline to that of standard gasoline. Standard gasoline is composed of isooctane and n-heptane. Isooctane has good anti-knock quality, with its octane number set at 100; n-heptane has poor anti-knock quality and is prone to knocking in gasoline engines, with its octane number set at 0. The main basis for selecting gasoline grades is the engine's compression ratio. Parameters such as compression ratio and ignition timing have already been set in the engine's computer. As long as the owner strictly follows the instructions to choose the appropriate gasoline, there will be absolutely no issues. Precautions for refueling: Vehicles should not arbitrarily switch to lower-grade gasoline. If lower-grade gasoline is used, it may cause premature combustion, leading to engine knocking. Additionally, incomplete combustion of gasoline can result in increased carbon deposits, which may clog conduits and injectors, as well as cause reduced vehicle power and increased fuel consumption.
