Light-Sport Aircraft Yahoo group Re: E15

#2 most likely. It was a Rotax restriction before for 5% ethanol which has recently been updated to 10% ethanol.
However, you should clearly ask Sky Arrow if the rest of the fuel system is ready for 10% ethanol. Car gas in the US has many other issues besides ethanol and you will find different results with different suppliers in different climates (formulations for winter versus summer etc.)
Abid

--- In Sport_Aircraft@yahoogroups.com, Edward Benson <FastEddieB@...> wrote:
>
> For some reason, my Sky Arrow, with a ROTAX 912ULS, mandates no more
> than 5% ethanol.
>
> I wonder if that's because...
>
> 1) They're just being conservative,
>
> 2) They're relying on some prior ROTAX restriction, or,
>
> 3) There's something else in the Sky Arrow fuel system that might not
> like more than 5% ethanol.
>
> I do my best to find fuel with less than 10% ethanol. Many of the
> pumps around here (N GA and TN) say "up to 10% ethanol", implying that
> there might be less.
>
> I try to seek out stations that don't say that, but I'm not sure that
> lack of an ethanol warning is any guarantee there's no ethanol in the
> fuel.
>
> Fast Eddie B. (Ed Benson - Mineral Bluff, GA)
> Sky Arrow 600LSA • N467SA
>

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