this post was submitted on 18 Oct 2024
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Depends on the compression of the engine. I've got a 40 year old 125cc scooter that should arguably take premium, because it was rated 10:1 when it was new.
My car has the same compression ratio and asks for 87 AKI, which I believe is 91 RON. I have to give it 95 though because that's the lowest they sell here.
Funnily enough, car's only 10 years old. I'm surprised they didn't mandate something higher than... 87.
https://www.bmwmoa.org/news/438324/Understanding-octane--AKI-MON-and-RON-oh-my.htm