Octane rating has no bearing on the quality of the fuel lmao. It just runs better in engines that are designed to run it.
Octane rating does not relate directly to the power output or the energy content of the fuel per unit mass or volume, but simply indicates the resistance to auto-ignition under pressure without a spark.
Some engines will adjust spark advance by using the knock sensor, and when using a higher octane gas, will be more efficient.
The gas is not more power dense, but it gets used more efficiently. If your car doesn’t, then it’s not better to use higher octane gas.
That sounds about right to me. Some places will sell 93 AKI/100 RON in the US, but it’s not as common, and the only cars that actually require it are probably modified turbocharged cars. Most US commuter cars run perfectly fine on 87 AKI and it’s significantly cheaper. I live in Washington so for some reason they sell 92 AKI gasoline, which is an oddball number I don’t see anywhere else.
I’ve found older, worn down cars and high compression engines get a lot of spark knock if you don’t use 93. And that’s after making sure everything’s clean inside.
![[OC] Meanwhile.. in San Jose, California](https://lemmy.world/pictrs/image/3dc6bbaa-c278-4ba0-bacd-02efcb636e46.jpeg){kind=link}
Whatever it is, my gasoline options are 95 and 100. That’s it.
Still sounds like you’re saying my options are 91 and 93 AKI or whatever. So the US 87 Regular is lower quality.
Octane rating has nothing to do with quality, it’s just how fast the fuel burns.
If you are buying higher octane without specific instructions from your vehicle manufacturer, you’re getting scammed.
Octane rating has no bearing on the quality of the fuel lmao. It just runs better in engines that are designed to run it.
https://en.wikipedia.org/wiki/Octane_rating
Some engines will adjust spark advance by using the knock sensor, and when using a higher octane gas, will be more efficient. The gas is not more power dense, but it gets used more efficiently. If your car doesn’t, then it’s not better to use higher octane gas.
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That sounds about right to me. Some places will sell 93 AKI/100 RON in the US, but it’s not as common, and the only cars that actually require it are probably modified turbocharged cars. Most US commuter cars run perfectly fine on 87 AKI and it’s significantly cheaper. I live in Washington so for some reason they sell 92 AKI gasoline, which is an oddball number I don’t see anywhere else.
I’ve found older, worn down cars and high compression engines get a lot of spark knock if you don’t use 93. And that’s after making sure everything’s clean inside.