Should cars use A95 or A92 gasoline?
New drivers often ask whether they should use A95 or A92 gasoline and what the difference is between the two types.
Distinguishing between A95 and A92 gasoline
The numbers 95 and 92 refer to the octane rating (RON), a traditional quantitative measure of fuel quality for internal combustion engines based on its ignition properties and resistance to knocking. The higher the octane rating, the greater the resistance to knocking, and vice versa. This means that if problems arise due to weather conditions, temperature, pressure, etc., A95 gasoline will burn less easily than A92 gasoline.
Should you use A95 or A92 gasoline for your car?
The RON rating indicates the ability of gasoline to explode due to compression, and it is expressed on a scale from 0 to 100. The lowest pressure at which gasoline explodes is 0 RON, and the highest pressure it can withstand is 100 RON.
It's understandable that RON95 gasoline can withstand higher pressure than RON92. Specifically, RON95 gasoline can ignite when compressed to a pressure of 95, whereas RON92 gasoline burns completely when compressed to 92 octane. The higher the octane rating, the higher the compression ratio.
Therefore, A95 gasoline is suitable for engines with higher compression, while using A92 gasoline will not achieve the maximum combustion rate of a gasoline engine. This reduces engine efficiency and may damage the engine over time.
Conversely, putting RON95 gasoline into a 92 octane engine is also unsuitable because it will not achieve the optimal pressure of RON95 gasoline, resulting in waste.
Simply put, if your car has a compression ratio of 95 or higher, you should use A95 gasoline for optimal performance. If your car has a compression ratio lower than 95, you should use 92 octane gasoline.
Specifically, according to experts, because gasoline engines are of the forced-ignition type, every effort is made to avoid explosions. Therefore, engines with a compression ratio greater than 9.5:1 use RON 95 gasoline, while engines with a compression ratio less than 9.5:1 use RON 92 gasoline.
Is mixing A95 and A92 gasoline harmful?
A question that many users wonder about is whether mixing RON 95 and RON 92 gasoline will affect the vehicle in any way?
Gas stations typically only sell two types of gasoline. When consumers buy gasoline and don't remember which type they used previously, mixing RON95 and RON92 can affect car engines, although it takes some time to determine the specific consequences.