Should cars be filled with A95 or A92 gasoline?
New car drivers always ask the question of whether to fill with A95 or A92 gasoline and what is the difference between these two types of gasoline?
Distinguishing between A95 gasoline and A92 gasoline
The numbers 95 and 92 are understood as octane index (RON), which is a traditional quantitative measure of fuel quality for internal combustion engines based on the ability to detonate and shows the ability to resist detonation of gasoline. The higher the octane index, the higher the ability to resist detonation and vice versa. This means that if there is a problem due to weather conditions, temperature, pressure, etc., A95 gasoline is less flammable than A92 gasoline.
Should I use A95 or A92 gasoline for my car?
The index that indicates the ability to detonate is called RON and is expressed on a scale of 0 to 100. The lowest pressure at which gasoline detonates is 0 RON and the highest pressure it can withstand is 100 RON.
It is understandable that RON95 gasoline can withstand higher pressure than RON92. In particular, when RON95 gasoline is compressed to a pressure of 95, it can catch fire. While RON92 gasoline is compressed to 92 and burns completely, the higher the octane number, the higher the compression ratio.
Thus, A95 gasoline will be suitable for engines with higher compression, if filling with A92 gasoline will not reach the maximum combustion level of the gasoline engine. This reduces engine performance and can damage the engine over time.
On the contrary, pouring RON95 gasoline into a 92 engine is also not suitable because it will not achieve the optimal pressure of RON95 gasoline, causing waste.
To put it simply, if your car has a compression ratio greater than or equal to 95, you should use A95 gasoline to achieve the highest efficiency. If your car has a compression ratio less than 95, you should use 92 gasoline.
Specifically, according to experts, because gasoline engines are forced-ignition engines, they often try to find every solution to avoid explosions. Therefore, engines with a compression ratio greater than 9.5:1 use RON 95 gasoline, engines with a compression ratio less than 9.5:1 use RON 92 gasoline.
Is it harmful to mix A95 and A92 gasoline?
A question that many users wonder is when mixing two types of gasoline RON 95 and RON92, will the vehicle be affected?
Gas stations usually sell only two types of gasoline. When consumers come to buy gasoline and don't remember which type they used before and fill up the wrong one, mixing RON95 and RON92 can affect the car engine, but it will take some time to determine the specific consequences.