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Rate 100LL, 93/94 autogas, 91 Mogas for Rotax 914

 
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cloud9sa



Joined: 19 Feb 2012
Posts: 5
Location: 46MI and MI26

PostPosted: Mon Feb 20, 2012 5:19 am    Post subject: Rate 100LL, 93/94 autogas, 91 Mogas for Rotax 914 Reply with quote

I have 100LL, 93/93 Autogas (10% ethanol), and 91 Mogas (no ethanol) in my area. Please rate from best to worst for use in the Rotax 914.

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Roger Lee



Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

PostPosted: Mon Feb 20, 2012 6:09 am    Post subject: Re: Rate 100LL, 93/94 autogas, 91 Mogas for Rotax 914 Reply with quote

91 no ethanol, 91 or higher with ethanol, 100LL is not a good choice at all because of the extra maint. Cost and leading it causes. Either of the first two are good choices and the Rotax engine doesn't care about the ethanol, but make sure your fuel tanks are okay with ethanol.

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markdonahue(at)earthlink.
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PostPosted: Mon Feb 20, 2012 10:52 am    Post subject: Rate 100LL, 93/94 autogas, 91 Mogas for Rotax 914 Reply with quote

Roger,
Would you comment on 80 HP UL fuel. I have always used hi test mogas, 91
octane,( except when cross country flying and have to use 100LL).
Would I be better off with a lower octane rated fuel?
Mark Donahue
Kitfox IV, Rotax 912 UL.

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Roger Lee



Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

PostPosted: Mon Feb 20, 2012 1:47 pm    Post subject: Re: Rate 100LL, 93/94 autogas, 91 Mogas for Rotax 914 Reply with quote

The UL can use 87 octane all day long. no need for 91 oct. with the UL because it is only 9:1 compression ratio

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Roger Lee
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Light Sport Repairman
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