Remi/Tim, For what it's worth the LAA website seems to call for 95RON mogas
for 912 as well as 912S & 914. I can't say I have ever come across 82UL, and
would certainly be reluctant to feed it to my 914!
Regards, David Joyce, G-XSDJ
----- Original Message -----
From: "Guerner Remi" <air.guerner@orange.fr>
Sent: Sunday, August 29, 2010 11:07 AM
Subject: Europa-List: 82 UL MOGAS
>
>
> Hi all,
>
> Landing at Sywell last September for the LAA rally, I was surprised they
> had both 100LL Avgas and 82UL Mogas. I decided to take 20 liters of
> this -unknown to me- 82UL. This small quantity being mixed with about 50
> liters of the fuel remaining, I thought I was not taking a big risk.
> Later I did some research on the internet and among available
> publications. This is what I found:
> 82UL has a MON (Motor Octane Number) of 82 and AKI (Anti Knock Index) of
> 87, which translate into a RON (Research Octane Number) of 92, as
> AKI=(RON+MON)/2.
> In their Operator's Manuals and applicable SI, Rotax provides the
> following instructions regarding the suitable fuels:
> 912 UL: minimum RON: 90 or minimum AKI: 87
> 912 ULS and 914UL: minimum RON: 95 or minimum AKI: 91
> So it is clear that 82UL is not suitable for the 912 ULS and 914.
> In order to confirm this conclusion, could anyone provide a detailed
> specification of this 82UL Mogas as supplied in the UK?
> Other questions: is there any ethanol in this fuel? Why they do not
> supply Premium or Premium Plus / Super, whatever they call it, which
> would offer the higher octane rating we need for the 912S and 914, with
> only a slight cost increase?
>
> Comments please!
>
> Regards
> Remi Guerner
> F-PGKL
>
>
>
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