[Tagging] Fuel octane ratings: RON versus AKI

Paul Johnson baloo at ursamundi.org
Sat Jul 20 17:57:27 UTC 2019


On Fri, Jul 19, 2019 at 7:25 PM Minh Nguyen <minh at nguyen.cincinnati.oh.us>
wrote:

> Compounding the matter, for several years, the fuel:* wiki page has
> specified that octane ratings must be expressed in RON, which is used in
> more countries. [3] In a few countries including U.S., octane ratings
> are only posted in RON, not AKI. Converting between AKI and RON would
> require knowing the MON, which AFAICT isn't published anywhere.
> Wikipedia does offer estimates for regular and premium grade, but they
> aren't reliable or specific enough to use as subkeys. [4]


This is one of those situations where I generally reject the advice in the
wiki.  For octane ratings, I don't think most people even look to tell if
they're rating it in RON or AKI.  I take AKI for granted because it's
*the* number
available at the stations.
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