[Talk-us] amenity:fuel and fuel types for the US

[Richard Welty]

On 8/18/11 6:30 AM, Peter Dobratz wrote:
> Does anyone know how to translate the US octane measurements to the
> European ones used (fuel:octane_91, fuel:octane_95, fuel:octane_98,
> fuel:octane_100)?
>
that's actually hard to do, as there are different ways of measuring octane
and there isn't a natural formula to get from one to the next. the
Europeans standardized on one system, the US on another.

to get technical, in most of the world (including europe), the number
on the pump is RON (Research Octane Number.) in the US, the number
on the pump is AKI (Anti Knock index), which is the average of the
RON and MON values (MON is Motor Octane Number). the difference
between RON and AKI is typically 8-10 points.

     http://en.wikipedia.org/wiki/Octane_rating

rather than messing about, i'd suggest modifying the tagging system
to let us enter the AKI numbers directly with clear labeling.

richard